77908144536 has 96 divisors (see below), whose sum is σ = 226126049760. Its totient is φ = 24168900096.

The previous prime is 77908144529. The next prime is 77908144537. The reversal of 77908144536 is 63544180977.

77908144536 is a `hidden beast` number, since 7 + 7 + 90 + 8 + 14 + 4 + 536 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77908144537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 574485 + ... + 697028.

It is an arithmetic number, because the mean of its divisors is an integer number (2355479685).

Almost surely, 2^77908144536 is an apocalyptic number.

It is an amenable number.

77908144536 is an abundant number, since it is smaller than the sum of its proper divisors (148217905224).

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

77908144536 is a wasteful number, since it uses less digits than its factorization.

77908144536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271585 (or 1271578 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 77908144536 in words is "seventy-seven billion, nine hundred eight million, one hundred forty-four thousand, five hundred thirty-six".