61272727920 has 120 divisors (see below), whose sum is σ = 205819250832. Its totient is φ = 16335820800.

The previous prime is 61272727907. The next prime is 61272727937. The reversal of 61272727920 is 2972727216.

61272727920 is a `hidden beast` number, since 612 + 7 + 2 + 7 + 2 + 7 + 9 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5813055 + ... + 5823585.

Almost surely, 2^61272727920 is an apocalyptic number.

61272727920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61272727920 is an abundant number, since it is smaller than the sum of its proper divisors (144546522912).

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

61272727920 is a wasteful number, since it uses less digits than its factorization.

61272727920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18631 (or 18622 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The spelling of 61272727920 in words is "sixty-one billion, two hundred seventy-two million, seven hundred twenty-seven thousand, nine hundred twenty".