77043700040400 has 180 divisors, whose sum is σ = 268964018555232. Its totient is φ = 20421962645760.

The previous prime is 77043700040383. The next prime is 77043700040441. The reversal of 77043700040400 is 404000734077.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 63473734 + ... + 64676133.

Almost surely, 2^{77043700040400} is an apocalyptic number.

It is an amenable number.

77043700040400 is an abundant number, since it is smaller than the sum of its proper divisors (191920318514832).

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

77043700040400 is a wasteful number, since it uses less digits than its factorization.

77043700040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128150058 (or 128150044 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 36.

Adding to 77043700040400 its reverse (404000734077), we get a palindrome (77447700774477).

The spelling of 77043700040400 in words is "seventy-seven trillion, forty-three billion, seven hundred million, forty thousand, four hundred".