74723437656 has 160 divisors (see below), whose sum is σ = 247442580000. Its totient is φ = 20613325824.

The previous prime is 74723437639. The next prime is 74723437687. The reversal of 74723437656 is 65673432747.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 152481 + ... + 415568.

It is an arithmetic number, because the mean of its divisors is an integer number (1546516125).

Almost surely, 2^74723437656 is an apocalyptic number.

It is an amenable number.

74723437656 is an abundant number, since it is smaller than the sum of its proper divisors (172719142344).

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

74723437656 is a wasteful number, since it uses less digits than its factorization.

74723437656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568103 (or 568090 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 54.

The spelling of 74723437656 in words is "seventy-four billion, seven hundred twenty-three million, four hundred thirty-seven thousand, six hundred fifty-six".