315604606615661 has 32 divisors (see below), whose sum is σ = 352688616652800. Its totient is φ = 280013935582080.

The previous prime is 315604606615657. The next prime is 315604606615663. The reversal of 315604606615661 is 166516606406513.

It is a cyclic number.

It is not a de Polignac number, because 315604606615661 - 2² = 315604606615657 is a prime.

It is a super-2 number, since 2×315604606615661² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315604606615597 and 315604606615606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315604606615663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34568030 + ... + 42733568.

It is an arithmetic number, because the mean of its divisors is an integer number (11021519270400).

Almost surely, 2^{315604606615661} is an apocalyptic number.

It is an amenable number.

315604606615661 is a deficient number, since it is larger than the sum of its proper divisors (37084010037139).

315604606615661 is a wasteful number, since it uses less digits than its factorization.

315604606615661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8166129.

The product of its (nonzero) digits is 13996800, while the sum is 56.

The spelling of 315604606615661 in words is "three hundred fifteen trillion, six hundred four billion, six hundred six million, six hundred fifteen thousand, six hundred sixty-one".