75681090521640 has 96 divisors (see below), whose sum is σ = 245974260074400. Its totient is φ = 20180744887680.

The previous prime is 75681090521633. The next prime is 75681090521671. The reversal of 75681090521640 is 4612509018657.

It is a happy number.

75681090521640 is a `hidden beast` number, since 7 + 5 + 6 + 8 + 109 + 0 + 521 + 6 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3716031 + ... + 12851889.

It is an arithmetic number, because the mean of its divisors is an integer number (2562231875775).

Almost surely, 2^{75681090521640} is an apocalyptic number.

It is an amenable number.

75681090521640 is an abundant number, since it is smaller than the sum of its proper divisors (170293169552760).

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

75681090521640 is a wasteful number, since it uses less digits than its factorization.

75681090521640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158887 (or 9158880 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 75681090521640 in words is "seventy-five trillion, six hundred eighty-one billion, ninety million, five hundred twenty-one thousand, six hundred forty".