55871338890 has 32 divisors (see below), whose sum is σ = 134103931776. Its totient is φ = 14897610560.

The previous prime is 55871338871. The next prime is 55871338891. The reversal of 55871338890 is 9883317855.

It is a happy number.

It is a super-2 number, since 2×55871338890² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55871338890.

It is not an unprimeable number, because it can be changed into a prime (55871338891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255139 + ... + 420521.

It is an arithmetic number, because the mean of its divisors is an integer number (4190747868).

Almost surely, 2^55871338890 is an apocalyptic number.

55871338890 is an abundant number, since it is smaller than the sum of its proper divisors (78232592886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55871338890 is a wasteful number, since it uses less digits than its factorization.

55871338890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176654.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 55871338890 in words is "fifty-five billion, eight hundred seventy-one million, three hundred thirty-eight thousand, eight hundred ninety".