78532545 has 48 divisors (see below), whose sum is σ = 157429440. Its totient is φ = 33134976.

The previous prime is 78532541. The next prime is 78532561. The reversal of 78532545 is 54523587.

It is not a de Polignac number, because 78532545 - 2² = 78532541 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (78532541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5446 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (3279780).

Almost surely, 2^78532545 is an apocalyptic number.

It is an amenable number.

78532545 is an abundant number, since it is smaller than the sum of its proper divisors (78896895).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78532545 is a wasteful number, since it uses less digits than its factorization.

78532545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8254 (or 8247 counting only the distinct ones).

The product of its digits is 168000, while the sum is 39.

The square root of 78532545 is about 8861.8590036177. The cubic root of 78532545 is about 428.2360494425.

The spelling of 78532545 in words is "seventy-eight million, five hundred thirty-two thousand, five hundred forty-five".