72974377749 has 32 divisors (see below), whose sum is σ = 119767588864. Its totient is φ = 38487234240.

The previous prime is 72974377741. The next prime is 72974377807. The reversal of 72974377749 is 94777347927.

It is not a de Polignac number, because 72974377749 - 2³ = 72974377741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72974377749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72974377741) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3930402 + ... + 3948924.

It is an arithmetic number, because the mean of its divisors is an integer number (3742737152).

Almost surely, 2^72974377749 is an apocalyptic number.

It is an amenable number.

72974377749 is a deficient number, since it is larger than the sum of its proper divisors (46793211115).

72974377749 is a wasteful number, since it uses less digits than its factorization.

72974377749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32977.

The product of its digits is 130691232, while the sum is 66.

The spelling of 72974377749 in words is "seventy-two billion, nine hundred seventy-four million, three hundred seventy-seven thousand, seven hundred forty-nine".