55581621182 has 16 divisors (see below), whose sum is σ = 86342226432. Its totient is φ = 26806719960.

The previous prime is 55581621103. The next prime is 55581621191. The reversal of 55581621182 is 28112618555.

It is a super-2 number, since 2×55581621182² (a number of 22 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 7 ways as a sum of consecutive naturals, for example, 1441028 + ... + 1479095.

It is an arithmetic number, because the mean of its divisors is an integer number (5396389152).

Almost surely, 2^55581621182 is an apocalyptic number.

55581621182 is a deficient number, since it is larger than the sum of its proper divisors (30760605250).

55581621182 is a wasteful number, since it uses less digits than its factorization.

55581621182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920463.

The product of its digits is 192000, while the sum is 44.

The spelling of 55581621182 in words is "fifty-five billion, five hundred eighty-one million, six hundred twenty-one thousand, one hundred eighty-two".