315661642530 has 128 divisors (see below), whose sum is σ = 847170938880. Its totient is φ = 75194346240.

The previous prime is 315661642507. The next prime is 315661642531. The reversal of 315661642530 is 35246166513.

It is not an unprimeable number, because it can be changed into a prime (315661642531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1965964 + ... + 2120456.

It is an arithmetic number, because the mean of its divisors is an integer number (6618522960).

Almost surely, 2^315661642530 is an apocalyptic number.

315661642530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 315661642530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423585469440).

315661642530 is an abundant number, since it is smaller than the sum of its proper divisors (531509296350).

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

315661642530 is a wasteful number, since it uses less digits than its factorization.

315661642530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154573 (or 154547 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 315661642530 in words is "three hundred fifteen billion, six hundred sixty-one million, six hundred forty-two thousand, five hundred thirty".