81964075710 has 64 divisors (see below), whose sum is σ = 214624940544. Its totient is φ = 19867478400.

The previous prime is 81964075679. The next prime is 81964075727. The reversal of 81964075710 is 1757046918.

It is a super-2 number, since 2×81964075710² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81964075710.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4041295 + ... + 4061525.

It is an arithmetic number, because the mean of its divisors is an integer number (3353514696).

Almost surely, 2^81964075710 is an apocalyptic number.

81964075710 is an abundant number, since it is smaller than the sum of its proper divisors (132660864834).

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

81964075710 is a wasteful number, since it uses less digits than its factorization.

81964075710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32529.

The product of its (nonzero) digits is 423360, while the sum is 48.

The spelling of 81964075710 in words is "eighty-one billion, nine hundred sixty-four million, seventy-five thousand, seven hundred ten".