81692627652 has 24 divisors (see below), whose sum is σ = 211795701600. Its totient is φ = 27230875848.

The previous prime is 81692627651. The next prime is 81692627657. The reversal of 81692627652 is 25672629618.

81692627652 is a `hidden beast` number, since 8 + 1 + 6 + 9 + 2 + 627 + 6 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (81692627651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378206502 + ... + 378206717.

It is an arithmetic number, because the mean of its divisors is an integer number (8824820900).

Almost surely, 2^81692627652 is an apocalyptic number.

It is an amenable number.

81692627652 is an abundant number, since it is smaller than the sum of its proper divisors (130103073948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81692627652 is a wasteful number, since it uses less digits than its factorization.

81692627652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756413232 (or 756413224 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 81692627652 in words is "eighty-one billion, six hundred ninety-two million, six hundred twenty-seven thousand, six hundred fifty-two".