55778653031 has 4 divisors (see below), whose sum is σ = 57286184232. Its totient is φ = 54271121832.

The previous prime is 55778653027. The next prime is 55778653043. The reversal of 55778653031 is 13035687755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13035687755 = 5 ⋅2607137551.

It is a cyclic number.

It is not a de Polignac number, because 55778653031 - 2² = 55778653027 is a prime.

It is a super-2 number, since 2×55778653031² (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 (55778653081) 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, 753765545 + ... + 753765618.

It is an arithmetic number, because the mean of its divisors is an integer number (14321546058).

Almost surely, 2^55778653031 is an apocalyptic number.

55778653031 is a deficient number, since it is larger than the sum of its proper divisors (1507531201).

55778653031 is a wasteful number, since it uses less digits than its factorization.

55778653031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507531200.

The product of its (nonzero) digits is 2646000, while the sum is 50.

The spelling of 55778653031 in words is "fifty-five billion, seven hundred seventy-eight million, six hundred fifty-three thousand, thirty-one".