3551738121165 has 64 divisors (see below), whose sum is σ = 6263812832256. Its totient is φ = 1707598098432.

The previous prime is 3551738121157. The next prime is 3551738121187. The reversal of 3551738121165 is 5611218371553.

It is not a de Polignac number, because 3551738121165 - 2³ = 3551738121157 is a prime.

It is a super-2 number, since 2×3551738121165² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3764409 + ... + 4612401.

It is an arithmetic number, because the mean of its divisors is an integer number (97872075504).

Almost surely, 2^{3551738121165} is an apocalyptic number.

It is an amenable number.

3551738121165 is a deficient number, since it is larger than the sum of its proper divisors (2712074711091).

3551738121165 is a wasteful number, since it uses less digits than its factorization.

3551738121165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848518.

The product of its digits is 756000, while the sum is 48.

The spelling of 3551738121165 in words is "three trillion, five hundred fifty-one billion, seven hundred thirty-eight million, one hundred twenty-one thousand, one hundred sixty-five".