77533053057553 has 4 divisors (see below), whose sum is σ = 80034119285248. Its totient is φ = 75031986829860.

The previous prime is 77533053057533. The next prime is 77533053057611. The reversal of 77533053057553 is 35575035033577.

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 a de Polignac number, because none of the positive numbers 2^k-77533053057553 is a prime.

It is a super-2 number, since 2×77533053057553² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77533053057533) 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, 1250533113801 + ... + 1250533113862.

It is an arithmetic number, because the mean of its divisors is an integer number (20008529821312).

Almost surely, 2^{77533053057553} is an apocalyptic number.

It is an amenable number.

77533053057553 is a deficient number, since it is larger than the sum of its proper divisors (2501066227695).

77533053057553 is a wasteful number, since it uses less digits than its factorization.

77533053057553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501066227694.

The product of its (nonzero) digits is 86821875, while the sum is 58.

The spelling of 77533053057553 in words is "seventy-seven trillion, five hundred thirty-three billion, fifty-three million, fifty-seven thousand, five hundred fifty-three".