61512863 has 4 divisors (see below), whose sum is σ = 61962000. Its totient is φ = 61063728.

The previous prime is 61512859. The next prime is 61512911. The reversal of 61512863 is 36821516.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61512863 - 2² = 61512859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61512853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224363 + ... + 224636.

It is an arithmetic number, because the mean of its divisors is an integer number (15490500).

Almost surely, 2^61512863 is an apocalyptic number.

61512863 is a deficient number, since it is larger than the sum of its proper divisors (449137).

61512863 is a wasteful number, since it uses less digits than its factorization.

61512863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449136.

The product of its digits is 8640, while the sum is 32.

The square root of 61512863 is about 7843.0136427269. The cubic root of 61512863 is about 394.7498560441.

The spelling of 61512863 in words is "sixty-one million, five hundred twelve thousand, eight hundred sixty-three".