77521040023 has 16 divisors (see below), whose sum is σ = 92656221696. Its totient is φ = 63414093600.

The previous prime is 77521039997. The next prime is 77521040029. The reversal of 77521040023 is 32004012577.

It is a cyclic number.

It is not a de Polignac number, because 77521040023 - 2⁹ = 77521039511 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 (77521040029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472128 + ... + 614773.

It is an arithmetic number, because the mean of its divisors is an integer number (5791013856).

Almost surely, 2^77521040023 is an apocalyptic number.

77521040023 is a deficient number, since it is larger than the sum of its proper divisors (15135181673).

77521040023 is a wasteful number, since it uses less digits than its factorization.

77521040023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087374.

The product of its (nonzero) digits is 11760, while the sum is 31.

The spelling of 77521040023 in words is "seventy-seven billion, five hundred twenty-one million, forty thousand, twenty-three".