77251456506 has 64 divisors (see below), whose sum is σ = 182672775936. Its totient is φ = 21320256000.

The previous prime is 77251456501. The next prime is 77251456519. The reversal of 77251456506 is 60565415277.

It is not an unprimeable number, because it can be changed into a prime (77251456501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48165 + ... + 396008.

It is an arithmetic number, because the mean of its divisors is an integer number (2854262124).

Almost surely, 2^77251456506 is an apocalyptic number.

77251456506 is an abundant number, since it is smaller than the sum of its proper divisors (105421319430).

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

77251456506 is a wasteful number, since it uses less digits than its factorization.

77251456506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444327.

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 77251456506 in words is "seventy-seven billion, two hundred fifty-one million, four hundred fifty-six thousand, five hundred six".