61315863 has 8 divisors (see below), whose sum is σ = 93433728. Its totient is φ = 35037624.

The previous prime is 61315847. The next prime is 61315867. The reversal of 61315863 is 36851316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61315863 - 2⁴ = 61315847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61315867) 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, 1459881 + ... + 1459922.

It is an arithmetic number, because the mean of its divisors is an integer number (11679216).

Almost surely, 2^61315863 is an apocalyptic number.

61315863 is a deficient number, since it is larger than the sum of its proper divisors (32117865).

61315863 is a wasteful number, since it uses less digits than its factorization.

61315863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919813.

The product of its digits is 12960, while the sum is 33.

The square root of 61315863 is about 7830.4446233914. Note that the first 3 decimals coincide. The cubic root of 61315863 is about 394.3279990920.

The spelling of 61315863 in words is "sixty-one million, three hundred fifteen thousand, eight hundred sixty-three".