15855055851 has 16 divisors (see below), whose sum is σ = 21926407968. Its totient is φ = 10182528000.

The previous prime is 15855055817. The next prime is 15855055861.

It is a happy number.

15855055851 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 15855055851 - 2¹⁰ = 15855054827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15855055851.

It is not an unprimeable number, because it can be changed into a prime (15855055861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695910 + ... + 718331.

It is an arithmetic number, because the mean of its divisors is an integer number (1370400498).

Almost surely, 2^15855055851 is an apocalyptic number.

15855055851 is a deficient number, since it is larger than the sum of its proper divisors (6071352117).

15855055851 is a wasteful number, since it uses less digits than its factorization.

15855055851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414382.

The product of its (nonzero) digits is 1000000, while the sum is 48.

The spelling of 15855055851 in words is "fifteen billion, eight hundred fifty-five million, fifty-five thousand, eight hundred fifty-one".