84009690831 has 16 divisors (see below), whose sum is σ = 122206705920. Its totient is φ = 50910467520.

The previous prime is 84009690827. The next prime is 84009690841. The reversal of 84009690831 is 13809690048.

It is not a de Polignac number, because 84009690831 - 2² = 84009690827 is a prime.

It is a super-2 number, since 2×84009690831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84009690811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288211 + ... + 501083.

It is an arithmetic number, because the mean of its divisors is an integer number (7637919120).

Almost surely, 2^84009690831 is an apocalyptic number.

84009690831 is a deficient number, since it is larger than the sum of its proper divisors (38197015089).

84009690831 is a wasteful number, since it uses less digits than its factorization.

84009690831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224846.

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 84009690831 in words is "eighty-four billion, nine million, six hundred ninety thousand, eight hundred thirty-one".