72771937020 has 36 divisors (see below), whose sum is σ = 220741542840. Its totient is φ = 19405849824.

The previous prime is 72771937019. The next prime is 72771937039. The reversal of 72771937020 is 2073917727.

72771937020 is a `hidden beast` number, since 7 + 277 + 1 + 9 + 370 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 202144090 + ... + 202144449.

Almost surely, 2^72771937020 is an apocalyptic number.

It is an amenable number.

72771937020 is an abundant number, since it is smaller than the sum of its proper divisors (147969605820).

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

72771937020 is a wasteful number, since it uses less digits than its factorization.

72771937020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404288554 (or 404288549 counting only the distinct ones).

The product of its (nonzero) digits is 259308, while the sum is 45.

The spelling of 72771937020 in words is "seventy-two billion, seven hundred seventy-one million, nine hundred thirty-seven thousand, twenty".