401644036530 has 48 divisors (see below), whose sum is σ = 1139208542784. Its totient is φ = 97368251040.

The previous prime is 401644036511. The next prime is 401644036639. The reversal of 401644036530 is 35630446104.

401644036530 is a `hidden beast` number, since 4 + 0 + 1 + 644 + 0 + 3 + 6 + 5 + 3 + 0 = 666.

It is a super-2 number, since 2×401644036530² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202849534 + ... + 202851513.

It is an arithmetic number, because the mean of its divisors is an integer number (23733511308).

Almost surely, 2^401644036530 is an apocalyptic number.

401644036530 is an abundant number, since it is smaller than the sum of its proper divisors (737564506254).

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

401644036530 is a wasteful number, since it uses less digits than its factorization.

401644036530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405701071 (or 405701068 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 401644036530 in words is "four hundred one billion, six hundred forty-four million, thirty-six thousand, five hundred thirty".