75391979776 has 45 divisors (see below), whose sum is σ = 151647070855. Its totient is φ = 37408234240.

The previous prime is 75391979759. The next prime is 75391979791. The reversal of 75391979776 is 67797919357.

The square root of 75391979776 is 274576.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

It is a super-2 number, since 2×75391979776² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 575511231 + ... + 575511361.

Almost surely, 2^75391979776 is an apocalyptic number.

75391979776 is the 274576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75391979776

75391979776 is an abundant number, since it is smaller than the sum of its proper divisors (76255091079).

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

75391979776 is an frugal number, since it uses more digits than its factorization.

75391979776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 133 counting only the distinct ones).

The product of its digits is 157529610, while the sum is 70.

The spelling of 75391979776 in words is "seventy-five billion, three hundred ninety-one million, nine hundred seventy-nine thousand, seven hundred seventy-six".