75773120640 has 128 divisors (see below), whose sum is σ = 276030702720. Its totient is φ = 17319567360.

The previous prime is 75773120627. The next prime is 75773120663. The reversal of 75773120640 is 4602137757.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 75773120592 and 75773120601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2805501 + ... + 2832380.

It is an arithmetic number, because the mean of its divisors is an integer number (2156489865).

Almost surely, 2^75773120640 is an apocalyptic number.

75773120640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

75773120640 is an abundant number, since it is smaller than the sum of its proper divisors (200257582080).

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

75773120640 is a wasteful number, since it uses less digits than its factorization.

75773120640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637910 (or 5637898 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 75773120640 in words is "seventy-five billion, seven hundred seventy-three million, one hundred twenty thousand, six hundred forty".