55278793940 has 12 divisors (see below), whose sum is σ = 116085467316. Its totient is φ = 22111517568.

The previous prime is 55278793939. The next prime is 55278793963. The reversal of 55278793940 is 4939787255.

It can be written as a sum of positive squares in 2 ways, for example, as 13252153924 + 42026640016 = 115118^2 + 205004^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55278793940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381969829 + ... + 1381969868.

It is an arithmetic number, because the mean of its divisors is an integer number (9673788943).

Almost surely, 2^55278793940 is an apocalyptic number.

It is an amenable number.

55278793940 is an abundant number, since it is smaller than the sum of its proper divisors (60806673376).

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

55278793940 is a wasteful number, since it uses less digits than its factorization.

55278793940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763939706 (or 2763939704 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 55278793940 in words is "fifty-five billion, two hundred seventy-eight million, seven hundred ninety-three thousand, nine hundred forty".