77120642501 has 4 divisors (see below), whose sum is σ = 88137877152. Its totient is φ = 66103407852.

The previous prime is 77120642383. The next prime is 77120642503. The reversal of 77120642501 is 10524602177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77120642501 - 2¹⁴ = 77120626117 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 (77120642503) 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 3 ways as a sum of consecutive naturals, for example, 5508617315 + ... + 5508617328.

It is an arithmetic number, because the mean of its divisors is an integer number (22034469288).

Almost surely, 2^77120642501 is an apocalyptic number.

It is an amenable number.

77120642501 is a deficient number, since it is larger than the sum of its proper divisors (11017234651).

77120642501 is a wasteful number, since it uses less digits than its factorization.

77120642501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11017234650.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 77120642501 in words is "seventy-seven billion, one hundred twenty million, six hundred forty-two thousand, five hundred one".