77770400704444 has 48 divisors (see below), whose sum is σ = 156442348404160. Its totient is φ = 33137082478080.

The previous prime is 77770400704397. The next prime is 77770400704459. The reversal of 77770400704444 is 44440700407777.

It is a super-2 number, since 2×77770400704444² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16728544 + ... + 20865880.

Almost surely, 2^{77770400704444} is an apocalyptic number.

It is an amenable number.

77770400704444 is an abundant number, since it is smaller than the sum of its proper divisors (78671947699716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77770400704444 is a wasteful number, since it uses less digits than its factorization.

77770400704444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141238 (or 4141236 counting only the distinct ones).

The product of its (nonzero) digits is 17210368, while the sum is 55.

Adding to 77770400704444 its reverse (44440700407777), we get a palindrome (122211101112221).

The spelling of 77770400704444 in words is "seventy-seven trillion, seven hundred seventy billion, four hundred million, seven hundred four thousand, four hundred forty-four".