3915557664513 has 16 divisors (see below), whose sum is σ = 5695478338752. Its totient is φ = 2373014528000.

The previous prime is 3915557664511. The next prime is 3915557664617. The reversal of 3915557664513 is 3154667555193.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3915557664513 - 2¹ = 3915557664511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3915557664511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329233 + ... + 2817713.

It is an arithmetic number, because the mean of its divisors is an integer number (355967396172).

Almost surely, 2^{3915557664513} is an apocalyptic number.

3915557664513 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

3915557664513 is a deficient number, since it is larger than the sum of its proper divisors (1779920674239).

3915557664513 is a wasteful number, since it uses less digits than its factorization.

3915557664513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536176.

The product of its digits is 51030000, while the sum is 60.

The spelling of 3915557664513 in words is "three trillion, nine hundred fifteen billion, five hundred fifty-seven million, six hundred sixty-four thousand, five hundred thirteen".