400641769755 has 32 divisors (see below), whose sum is σ = 712339729920. Its totient is φ = 213649302240.

The previous prime is 400641769751. The next prime is 400641769777. The reversal of 400641769755 is 557967146004.

400641769755 is a `hidden beast` number, since 400 + 64 + 176 + 9 + 7 + 5 + 5 = 666.

It is not a de Polignac number, because 400641769755 - 2² = 400641769751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400641769751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 943444 + ... + 1300526.

It is an arithmetic number, because the mean of its divisors is an integer number (22260616560).

Almost surely, 2^400641769755 is an apocalyptic number.

400641769755 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400641769755 is a deficient number, since it is larger than the sum of its proper divisors (311697960165).

400641769755 is a wasteful number, since it uses less digits than its factorization.

400641769755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365408 (or 365402 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 400641769755 in words is "four hundred billion, six hundred forty-one million, seven hundred sixty-nine thousand, seven hundred fifty-five".