55406939380 has 24 divisors (see below), whose sum is σ = 125304925032. Its totient is φ = 20457946752.

The previous prime is 55406939333. The next prime is 55406939431. The reversal of 55406939380 is 8393960455.

55406939380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6063425424 + 49343513956 = 77868^2 + 222134^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 106551547 + ... + 106552066.

It is an arithmetic number, because the mean of its divisors is an integer number (5221038543).

Almost surely, 2^55406939380 is an apocalyptic number.

It is an amenable number.

55406939380 is an abundant number, since it is smaller than the sum of its proper divisors (69897985652).

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

55406939380 is a wasteful number, since it uses less digits than its factorization.

55406939380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213103635 (or 213103633 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 55406939380 in words is "fifty-five billion, four hundred six million, nine hundred thirty-nine thousand, three hundred eighty".