61245778 has 16 divisors (see below), whose sum is σ = 105495840. Its totient is φ = 26373600.

The previous prime is 61245773. The next prime is 61245787. The reversal of 61245778 is 87754216.

It is a self number, because there is not a number n which added to its sum of digits gives 61245778.

It is not an unprimeable number, because it can be changed into a prime (61245773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72843 + ... + 73678.

It is an arithmetic number, because the mean of its divisors is an integer number (6593490).

Almost surely, 2^61245778 is an apocalyptic number.

61245778 is a deficient number, since it is larger than the sum of its proper divisors (44250062).

61245778 is a wasteful number, since it uses less digits than its factorization.

61245778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146553.

The product of its digits is 94080, while the sum is 40.

The square root of 61245778 is about 7825.9681829151. The cubic root of 61245778 is about 394.1777007690.

The spelling of 61245778 in words is "sixty-one million, two hundred forty-five thousand, seven hundred seventy-eight".