400377055680 has 672 divisors, whose sum is σ = 1654189102080. Its totient is φ = 90894182400.

The previous prime is 400377055649. The next prime is 400377055709. The reversal of 400377055680 is 86550773004.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63924229 + ... + 63930491.

Almost surely, 2^400377055680 is an apocalyptic number.

400377055680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400377055680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827094551040).

400377055680 is an abundant number, since it is smaller than the sum of its proper divisors (1253812046400).

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

400377055680 is a wasteful number, since it uses less digits than its factorization.

400377055680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454 (or 6431 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 400377055680 in words is "four hundred billion, three hundred seventy-seven million, fifty-five thousand, six hundred eighty".