1645517265116 has 12 divisors (see below), whose sum is σ = 2896300621032. Its totient is φ = 818002801968.

The previous prime is 1645517265113. The next prime is 1645517265143. The reversal of 1645517265116 is 6115627155461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645517265113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188956870 + ... + 1188958253.

It is an arithmetic number, because the mean of its divisors is an integer number (241358385086).

Almost surely, 2^{1645517265116} is an apocalyptic number.

It is an amenable number.

1645517265116 is a deficient number, since it is larger than the sum of its proper divisors (1250783355916).

1645517265116 is a wasteful number, since it uses less digits than its factorization.

1645517265116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377915300 (or 2377915298 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 50.

The spelling of 1645517265116 in words is "one trillion, six hundred forty-five billion, five hundred seventeen million, two hundred sixty-five thousand, one hundred sixteen".