75887753721 has 16 divisors (see below), whose sum is σ = 115376857344. Its totient is φ = 43953087744.

The previous prime is 75887753717. The next prime is 75887753737. The reversal of 75887753721 is 12735778857.

It is not a de Polignac number, because 75887753721 - 2² = 75887753717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75887754721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57229921 + ... + 57231246.

It is an arithmetic number, because the mean of its divisors is an integer number (7211053584).

Almost surely, 2^75887753721 is an apocalyptic number.

It is an amenable number.

75887753721 is a deficient number, since it is larger than the sum of its proper divisors (39489103623).

75887753721 is a wasteful number, since it uses less digits than its factorization.

75887753721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114461200.

The product of its digits is 23049600, while the sum is 60.

The spelling of 75887753721 in words is "seventy-five billion, eight hundred eighty-seven million, seven hundred fifty-three thousand, seven hundred twenty-one".