81244564962 has 32 divisors (see below), whose sum is σ = 177278505984. Its totient is φ = 24617115600.

The previous prime is 81244564943. The next prime is 81244564979. The reversal of 81244564962 is 26946544218.

It is a super-2 number, since 2×81244564962² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673387 + ... + 784817.

It is an arithmetic number, because the mean of its divisors is an integer number (5539953312).

Almost surely, 2^81244564962 is an apocalyptic number.

81244564962 is an abundant number, since it is smaller than the sum of its proper divisors (96033941022).

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

81244564962 is a wasteful number, since it uses less digits than its factorization.

81244564962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122494.

The product of its digits is 3317760, while the sum is 51.

The spelling of 81244564962 in words is "eighty-one billion, two hundred forty-four million, five hundred sixty-four thousand, nine hundred sixty-two".