77845401 has 8 divisors (see below), whose sum is σ = 115326560. Its totient is φ = 51896916.

The previous prime is 77845399. The next prime is 77845403. The reversal of 77845401 is 10454877.

It is an interprime number because it is at equal distance from previous prime (77845399) and next prime (77845403).

It is not a de Polignac number, because 77845401 - 2¹ = 77845399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77845403) 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, 1441555 + ... + 1441608.

It is an arithmetic number, because the mean of its divisors is an integer number (14415820).

Almost surely, 2^77845401 is an apocalyptic number.

It is an amenable number.

77845401 is a deficient number, since it is larger than the sum of its proper divisors (37481159).

77845401 is a wasteful number, since it uses less digits than its factorization.

77845401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883172 (or 2883166 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 77845401 is about 8823.0040802439. The cubic root of 77845401 is about 426.9833956691.

The spelling of 77845401 in words is "seventy-seven million, eight hundred forty-five thousand, four hundred one".