55552211551165 has 24 divisors (see below), whose sum is σ = 77546863331640. Its totient is φ = 38092694105088.

The previous prime is 55552211551157. The next prime is 55552211551171. The reversal of 55552211551165 is 56115511225555.

It can be written as a sum of positive squares in 4 ways, for example, as 382108186201 + 55170103364964 = 618149^2 + 7427658^2 .

It is not a de Polignac number, because 55552211551165 - 2³ = 55552211551157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41349721 + ... + 42672049.

It is an arithmetic number, because the mean of its divisors is an integer number (3231119305485).

Almost surely, 2^{55552211551165} is an apocalyptic number.

It is an amenable number.

55552211551165 is a deficient number, since it is larger than the sum of its proper divisors (21994651780475).

55552211551165 is a wasteful number, since it uses less digits than its factorization.

55552211551165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493821 (or 1493814 counting only the distinct ones).

The product of its digits is 1875000, while the sum is 49.

The spelling of 55552211551165 in words is "fifty-five trillion, five hundred fifty-two billion, two hundred eleven million, five hundred fifty-one thousand, one hundred sixty-five".