77125661575 has 6 divisors (see below), whose sum is σ = 95635820384. Its totient is φ = 61700529240.

The previous prime is 77125661573. The next prime is 77125661597. The reversal of 77125661575 is 57516652177.

It is not a de Polignac number, because 77125661575 - 2¹ = 77125661573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77125661573) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1542513207 + ... + 1542513256.

Almost surely, 2^77125661575 is an apocalyptic number.

77125661575 is a deficient number, since it is larger than the sum of its proper divisors (18510158809).

77125661575 is a wasteful number, since it uses less digits than its factorization.

77125661575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085026473 (or 3085026468 counting only the distinct ones).

The product of its digits is 3087000, while the sum is 52.

The spelling of 77125661575 in words is "seventy-seven billion, one hundred twenty-five million, six hundred sixty-one thousand, five hundred seventy-five".