1612015925661 has 40 divisors (see below), whose sum is σ = 2496704289024. Its totient is φ = 1035428365440.

The previous prime is 1612015925657. The next prime is 1612015925669. The reversal of 1612015925661 is 1665295102161.

1612015925661 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 0 + 1 + 592 + 56 + 6 + 1 = 666.

It is not a de Polignac number, because 1612015925661 - 2² = 1612015925657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612015925669) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 844060 + ... + 1984053.

Almost surely, 2^{1612015925661} is an apocalyptic number.

It is an amenable number.

1612015925661 is a deficient number, since it is larger than the sum of its proper divisors (884688363363).

1612015925661 is a wasteful number, since it uses less digits than its factorization.

1612015925661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828383 (or 2828374 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 1612015925661 in words is "one trillion, six hundred twelve billion, fifteen million, nine hundred twenty-five thousand, six hundred sixty-one".