77412121161575 has 48 divisors (see below), whose sum is σ = 102798416774880. Its totient is φ = 57621290496000.

The previous prime is 77412121161547. The next prime is 77412121161587. The reversal of 77412121161575 is 57516112121477.

It is a happy number.

It is not a de Polignac number, because 77412121161575 - 2⁴⁰ = 76312609533799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 209025065 + ... + 209395085.

It is an arithmetic number, because the mean of its divisors is an integer number (2141633682810).

Almost surely, 2^{77412121161575} is an apocalyptic number.

77412121161575 is a deficient number, since it is larger than the sum of its proper divisors (25386295613305).

77412121161575 is a wasteful number, since it uses less digits than its factorization.

77412121161575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375668 (or 375663 counting only the distinct ones).

The product of its digits is 823200, while the sum is 50.

The spelling of 77412121161575 in words is "seventy-seven trillion, four hundred twelve billion, one hundred twenty-one million, one hundred sixty-one thousand, five hundred seventy-five".