55291950864 has 240 divisors, whose sum is σ = 163721187840. Its totient is φ = 17861160960.

The previous prime is 55291950839. The next prime is 55291950877. The reversal of 55291950864 is 46805919255.

55291950864 is a `hidden beast` number, since 5 + 529 + 1 + 9 + 50 + 8 + 64 = 666.

55291950864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 55291950864.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 247945857 + ... + 247946079.

It is an arithmetic number, because the mean of its divisors is an integer number (682171616).

Almost surely, 2^55291950864 is an apocalyptic number.

55291950864 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55291950864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81860593920).

55291950864 is an abundant number, since it is smaller than the sum of its proper divisors (108429236976).

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

55291950864 is a wasteful number, since it uses less digits than its factorization.

55291950864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 55291950864 in words is "fifty-five billion, two hundred ninety-one million, nine hundred fifty thousand, eight hundred sixty-four".