72775995887 has 16 divisors (see below), whose sum is σ = 87622440960. Its totient is φ = 59047447392.

The previous prime is 72775995881. The next prime is 72775995899. The reversal of 72775995887 is 78859957727.

It is a cyclic number.

It is not a de Polignac number, because 72775995887 - 2¹⁴ = 72775979503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72775995881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64223 + ... + 386880.

It is an arithmetic number, because the mean of its divisors is an integer number (5476402560).

Almost surely, 2^72775995887 is an apocalyptic number.

72775995887 is a deficient number, since it is larger than the sum of its proper divisors (14846445073).

72775995887 is a wasteful number, since it uses less digits than its factorization.

72775995887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452342.

The product of its digits is 622339200, while the sum is 74.

The spelling of 72775995887 in words is "seventy-two billion, seven hundred seventy-five million, nine hundred ninety-five thousand, eight hundred eighty-seven".