913817777401 has 4 divisors (see below), whose sum is σ = 914001538212. Its totient is φ = 913634016592.

The previous prime is 913817777381. The next prime is 913817777549. The reversal of 913817777401 is 104777718319.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 519905892025 + 393911885376 = 721045^2 + 627624^2 .

It is a cyclic number.

It is not a de Polignac number, because 913817777401 - 2¹⁵ = 913817744633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913814777401) 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, 91872946 + ... + 91882891.

It is an arithmetic number, because the mean of its divisors is an integer number (228500384553).

Almost surely, 2^913817777401 is an apocalyptic number.

It is an amenable number.

913817777401 is a deficient number, since it is larger than the sum of its proper divisors (183760811).

913817777401 is a wasteful number, since it uses less digits than its factorization.

913817777401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183760810.

The product of its (nonzero) digits is 2074464, while the sum is 55.

The spelling of 913817777401 in words is "nine hundred thirteen billion, eight hundred seventeen million, seven hundred seventy-seven thousand, four hundred one".