77190978053 has 4 divisors (see below), whose sum is σ = 88218260640. Its totient is φ = 66163695468.

The previous prime is 77190978047. The next prime is 77190978071. The reversal of 77190978053 is 35087909177.

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 77190978053 - 2²² = 77186783749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77190978053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77190978023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5513641283 + ... + 5513641296.

It is an arithmetic number, because the mean of its divisors is an integer number (22054565160).

Almost surely, 2^77190978053 is an apocalyptic number.

It is an amenable number.

77190978053 is a deficient number, since it is larger than the sum of its proper divisors (11027282587).

77190978053 is a wasteful number, since it uses less digits than its factorization.

77190978053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027282586.

The product of its (nonzero) digits is 3333960, while the sum is 56.

The spelling of 77190978053 in words is "seventy-seven billion, one hundred ninety million, nine hundred seventy-eight thousand, fifty-three".