81962974300 has 18 divisors (see below), whose sum is σ = 177859654448. Its totient is φ = 32785189680.

The previous prime is 81962974267. The next prime is 81962974367. The reversal of 81962974300 is 347926918.

It is a super-2 number, since 2×81962974300² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 409814772 + ... + 409814971.

Almost surely, 2^81962974300 is an apocalyptic number.

It is an amenable number.

81962974300 is an abundant number, since it is smaller than the sum of its proper divisors (95896680148).

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

81962974300 is a wasteful number, since it uses less digits than its factorization.

81962974300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819629757 (or 819629750 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 81962974300 in words is "eighty-one billion, nine hundred sixty-two million, nine hundred seventy-four thousand, three hundred".