56821867311 has 32 divisors (see below), whose sum is σ = 87543507456. Its totient is φ = 32400000000.

The previous prime is 56821867301. The next prime is 56821867351. The reversal of 56821867311 is 11376812865.

It is not a de Polignac number, because 56821867311 - 2⁶ = 56821867247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821867301) 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, 1666686 + ... + 1700436.

It is an arithmetic number, because the mean of its divisors is an integer number (2735734608).

Almost surely, 2^56821867311 is an apocalyptic number.

56821867311 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56821867311 is a deficient number, since it is larger than the sum of its proper divisors (30721640145).

56821867311 is a wasteful number, since it uses less digits than its factorization.

56821867311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36783.

The product of its digits is 483840, while the sum is 48.

The spelling of 56821867311 in words is "fifty-six billion, eight hundred twenty-one million, eight hundred sixty-seven thousand, three hundred eleven".