81314526370 has 128 divisors (see below), whose sum is σ = 194304614400. Its totient is φ = 24242581440.

The previous prime is 81314526367. The next prime is 81314526373. The reversal of 81314526370 is 7362541318.

It is an interprime number because it is at equal distance from previous prime (81314526367) and next prime (81314526373).

It is a super-2 number, since 2×81314526370² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81314526373) 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 63 ways as a sum of consecutive naturals, for example, 820939 + ... + 914641.

It is an arithmetic number, because the mean of its divisors is an integer number (1518004800).

Almost surely, 2^81314526370 is an apocalyptic number.

81314526370 is an abundant number, since it is smaller than the sum of its proper divisors (112990088030).

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

81314526370 is a wasteful number, since it uses less digits than its factorization.

81314526370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93765 (or 93751 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 81314526370 in words is "eighty-one billion, three hundred fourteen million, five hundred twenty-six thousand, three hundred seventy".