55981794373 has 4 divisors (see below), whose sum is σ = 55991943360. Its totient is φ = 55971645388.

The previous prime is 55981794361. The next prime is 55981794431. The reversal of 55981794373 is 37349718955.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55981794373 - 2²⁹ = 55444923461 is a prime.

It is a super-2 number, since 2×55981794373² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55981794343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5066215 + ... + 5077252.

It is an arithmetic number, because the mean of its divisors is an integer number (13997985840).

Almost surely, 2^55981794373 is an apocalyptic number.

It is an amenable number.

55981794373 is a deficient number, since it is larger than the sum of its proper divisors (10148987).

55981794373 is a wasteful number, since it uses less digits than its factorization.

55981794373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148986.

The product of its digits is 28576800, while the sum is 61.

It can be divided in two parts, 5598 and 1794373, that added together give a palindrome (1799971).

The spelling of 55981794373 in words is "fifty-five billion, nine hundred eighty-one million, seven hundred ninety-four thousand, three hundred seventy-three".