5551665431125 has 64 divisors (see below), whose sum is σ = 7932560822784. Its totient is φ = 3839700480000.

The previous prime is 5551665431101. The next prime is 5551665431129. The reversal of 5551665431125 is 5211345661555.

It is a de Polignac number, because none of the positive numbers 2^k-5551665431125 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551665431129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4963765 + ... + 5978485.

It is an arithmetic number, because the mean of its divisors is an integer number (123946262856).

Almost surely, 2^{5551665431125} is an apocalyptic number.

5551665431125 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5551665431125 is a deficient number, since it is larger than the sum of its proper divisors (2380895391659).

5551665431125 is a wasteful number, since it uses less digits than its factorization.

5551665431125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014943 (or 1014933 counting only the distinct ones).

The product of its digits is 2700000, while the sum is 49.

The spelling of 5551665431125 in words is "five trillion, five hundred fifty-one billion, six hundred sixty-five million, four hundred thirty-one thousand, one hundred twenty-five".