72974377644 has 48 divisors (see below), whose sum is σ = 203059143168. Its totient is φ = 19943307648.

The previous prime is 72974377643. The next prime is 72974377741. The reversal of 72974377644 is 44677347927.

It is not an unprimeable number, because it can be changed into a prime (72974377643) 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 15 ways as a sum of consecutive naturals, for example, 18883777 + ... + 18887640.

It is an arithmetic number, because the mean of its divisors is an integer number (4230398816).

Almost surely, 2^72974377644 is an apocalyptic number.

It is an amenable number.

72974377644 is an abundant number, since it is smaller than the sum of its proper divisors (130084765524).

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

72974377644 is a wasteful number, since it uses less digits than its factorization.

72974377644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37771454 (or 37771452 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 60.

The spelling of 72974377644 in words is "seventy-two billion, nine hundred seventy-four million, three hundred seventy-seven thousand, six hundred forty-four".