74851771680 has 384 divisors, whose sum is σ = 309069250560. Its totient is φ = 16556866560.

The previous prime is 74851771679. The next prime is 74851771693. The reversal of 74851771680 is 8617715847.

74851771680 is a `hidden beast` number, since 7 + 48 + 517 + 7 + 1 + 6 + 80 = 666.

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 63 ways as a sum of consecutive naturals, for example, 897517 + ... + 977363.

It is an arithmetic number, because the mean of its divisors is an integer number (804867840).

Almost surely, 2^74851771680 is an apocalyptic number.

74851771680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74851771680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154534625280).

74851771680 is an abundant number, since it is smaller than the sum of its proper divisors (234217478880).

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

74851771680 is a wasteful number, since it uses less digits than its factorization.

74851771680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79909 (or 79895 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 54.

The spelling of 74851771680 in words is "seventy-four billion, eight hundred fifty-one million, seven hundred seventy-one thousand, six hundred eighty".