77555013 has 8 divisors (see below), whose sum is σ = 104196576. Its totient is φ = 51308400.

The previous prime is 77554999. The next prime is 77555021. The reversal of 77555013 is 31055577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77555013 - 2¹⁰ = 77553989 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77555033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98278 + ... + 99063.

It is an arithmetic number, because the mean of its divisors is an integer number (13024572).

Almost surely, 2^77555013 is an apocalyptic number.

It is an amenable number.

77555013 is a deficient number, since it is larger than the sum of its proper divisors (26641563).

77555013 is a wasteful number, since it uses less digits than its factorization.

77555013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197475.

The product of its (nonzero) digits is 18375, while the sum is 33.

The square root of 77555013 is about 8806.5324049821. The cubic root of 77555013 is about 426.4518063563.

The spelling of 77555013 in words is "seventy-seven million, five hundred fifty-five thousand, thirteen".