73772729640 has 112 divisors (see below), whose sum is σ = 248869214100. Its totient is φ = 19672720128.

The previous prime is 73772729633. The next prime is 73772729713. The reversal of 73772729640 is 4692727737.

It can be written as a sum of positive squares in 2 ways, for example, as 73689445764 + 83283876 = 271458^2 + 9126^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1235805 + ... + 1294124.

Almost surely, 2^73772729640 is an apocalyptic number.

It is an amenable number.

73772729640 is an abundant number, since it is smaller than the sum of its proper divisors (175096484460).

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

73772729640 is a wasteful number, since it uses less digits than its factorization.

73772729640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529958 (or 2529939 counting only the distinct ones).

The product of its (nonzero) digits is 6223392, while the sum is 54.

The spelling of 73772729640 in words is "seventy-three billion, seven hundred seventy-two million, seven hundred twenty-nine thousand, six hundred forty".