615465113044661 has 16 divisors (see below), whose sum is σ = 672264589912128. Its totient is φ = 558807432758400.

The previous prime is 615465113044657. The next prime is 615465113044667. The reversal of 615465113044661 is 166440311564516.

It is a cyclic number.

It is not a de Polignac number, because 615465113044661 - 2² = 615465113044657 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 (615465113044667) 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, 16447121 + ... + 38748393.

It is an arithmetic number, because the mean of its divisors is an integer number (42016536869508).

Almost surely, 2^{615465113044661} is an apocalyptic number.

It is an amenable number.

615465113044661 is a deficient number, since it is larger than the sum of its proper divisors (56799476867467).

615465113044661 is a wasteful number, since it uses less digits than its factorization.

615465113044661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22304452.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 615465113044661 in words is "six hundred fifteen trillion, four hundred sixty-five billion, one hundred thirteen million, forty-four thousand, six hundred sixty-one".