77642349513 has 16 divisors (see below), whose sum is σ = 107126167680. Its totient is φ = 49961158016.

The previous prime is 77642349467. The next prime is 77642349553. The reversal of 77642349513 is 31594324677.

It is a cyclic number.

It is not a de Polignac number, because 77642349513 - 2¹⁰ = 77642348489 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (77642349553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146356 + ... + 420362.

It is an arithmetic number, because the mean of its divisors is an integer number (6695385480).

Almost surely, 2^77642349513 is an apocalyptic number.

It is an amenable number.

77642349513 is a deficient number, since it is larger than the sum of its proper divisors (29483818167).

77642349513 is a wasteful number, since it uses less digits than its factorization.

77642349513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277296.

The product of its digits is 3810240, while the sum is 51.

The spelling of 77642349513 in words is "seventy-seven billion, six hundred forty-two million, three hundred forty-nine thousand, five hundred thirteen".