77112121161575 has 6 divisors (see below), whose sum is σ = 95619030240384. Its totient is φ = 61689696929240.

The previous prime is 77112121161571. The next prime is 77112121161613. The reversal of 77112121161575 is 57516112121177.

It is not a de Polignac number, because 77112121161575 - 2² = 77112121161571 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 (77112121161571) 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, 1542242423207 + ... + 1542242423256.

It is an arithmetic number, because the mean of its divisors is an integer number (15936505040064).

Almost surely, 2^{77112121161575} is an apocalyptic number.

77112121161575 is a deficient number, since it is larger than the sum of its proper divisors (18506909078809).

77112121161575 is a wasteful number, since it uses less digits than its factorization.

77112121161575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084484846473 (or 3084484846468 counting only the distinct ones).

The product of its digits is 205800, while the sum is 47.

The spelling of 77112121161575 in words is "seventy-seven trillion, one hundred twelve billion, one hundred twenty-one million, one hundred sixty-one thousand, five hundred seventy-five".