55781495371 has 16 divisors (see below), whose sum is σ = 65988837376. Its totient is φ = 46154144736.

The previous prime is 55781495359. The next prime is 55781495381. The reversal of 55781495371 is 17359418755.

It is not a de Polignac number, because 55781495371 - 2⁷ = 55781495243 is a prime.

It is a super-2 number, since 2×55781495371² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55781495351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815031 + ... + 880816.

It is an arithmetic number, because the mean of its divisors is an integer number (4124302336).

Almost surely, 2^55781495371 is an apocalyptic number.

55781495371 is a deficient number, since it is larger than the sum of its proper divisors (10207342005).

55781495371 is a wasteful number, since it uses less digits than its factorization.

55781495371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696018.

The product of its digits is 5292000, while the sum is 55.

The spelling of 55781495371 in words is "fifty-five billion, seven hundred eighty-one million, four hundred ninety-five thousand, three hundred seventy-one".