55278661692 has 24 divisors (see below), whose sum is σ = 133431253200. Its totient is φ = 17790833536.

The previous prime is 55278661637. The next prime is 55278661717. The reversal of 55278661692 is 29616687255.

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, 79423017 + ... + 79423712.

It is an arithmetic number, because the mean of its divisors is an integer number (5559635550).

Almost surely, 2^55278661692 is an apocalyptic number.

It is an amenable number.

55278661692 is an abundant number, since it is smaller than the sum of its proper divisors (78152591508).

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

55278661692 is a wasteful number, since it uses less digits than its factorization.

55278661692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158846765 (or 158846763 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 57.

The spelling of 55278661692 in words is "fifty-five billion, two hundred seventy-eight million, six hundred sixty-one thousand, six hundred ninety-two".