74647020640 has 192 divisors, whose sum is σ = 190668219840. Its totient is φ = 27524136960.

The previous prime is 74647020619. The next prime is 74647020661. The reversal of 74647020640 is 4602074647.

It is an interprime number because it is at equal distance from previous prime (74647020619) and next prime (74647020661).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 74647020593 and 74647020602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76403832 + ... + 76404808.

It is an arithmetic number, because the mean of its divisors is an integer number (993063645).

Almost surely, 2^74647020640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74647020640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95334109920).

74647020640 is an abundant number, since it is smaller than the sum of its proper divisors (116021199200).

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

74647020640 is a wasteful number, since it uses less digits than its factorization.

74647020640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 74647020640 in words is "seventy-four billion, six hundred forty-seven million, twenty thousand, six hundred forty".