55820867529 has 32 divisors (see below), whose sum is σ = 89436061440. Its totient is φ = 30292819200.

The previous prime is 55820867491. The next prime is 55820867533. The reversal of 55820867529 is 92576802855.

It is a de Polignac number, because none of the positive numbers 2^k-55820867529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55820867579) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714162 + ... + 788459.

It is an arithmetic number, because the mean of its divisors is an integer number (2794876920).

Almost surely, 2^55820867529 is an apocalyptic number.

It is an amenable number.

55820867529 is a deficient number, since it is larger than the sum of its proper divisors (33615193911).

55820867529 is a wasteful number, since it uses less digits than its factorization.

55820867529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502721.

The product of its (nonzero) digits is 12096000, while the sum is 57.

The spelling of 55820867529 in words is "fifty-five billion, eight hundred twenty million, eight hundred sixty-seven thousand, five hundred twenty-nine".