84051813428831 has 32 divisors (see below), whose sum is σ = 93866340542400. Its totient is φ = 74795099258880.

The previous prime is 84051813428819. The next prime is 84051813428857. The reversal of 84051813428831 is 13882431815048.

It is a happy number.

It is not a de Polignac number, because 84051813428831 - 2²² = 84051809234527 is a prime.

It is a super-2 number, since 2×84051813428831² (a number of 29 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 (84051813421831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454455431 + ... + 454640343.

It is an arithmetic number, because the mean of its divisors is an integer number (2933323141950).

Almost surely, 2^{84051813428831} is an apocalyptic number.

84051813428831 is a deficient number, since it is larger than the sum of its proper divisors (9814527113569).

84051813428831 is a wasteful number, since it uses less digits than its factorization.

84051813428831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187739.

The product of its (nonzero) digits is 5898240, while the sum is 56.

The spelling of 84051813428831 in words is "eighty-four trillion, fifty-one billion, eight hundred thirteen million, four hundred twenty-eight thousand, eight hundred thirty-one".