74897767440 has 360 divisors, whose sum is σ = 271159394688. Its totient is φ = 18515934720.

The previous prime is 74897767423. The next prime is 74897767453. The reversal of 74897767440 is 4476779847.

74897767440 is a `hidden beast` number, since 7 + 48 + 97 + 7 + 67 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12213175 + ... + 12219305.

Almost surely, 2^74897767440 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 74897767440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135579697344).

74897767440 is an abundant number, since it is smaller than the sum of its proper divisors (196261627248).

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

74897767440 is a wasteful number, since it uses less digits than its factorization.

74897767440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235 (or 6207 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 63.

The spelling of 74897767440 in words is "seventy-four billion, eight hundred ninety-seven million, seven hundred sixty-seven thousand, four hundred forty".