400247644641 has 16 divisors (see below), whose sum is σ = 577246361664. Its totient is φ = 245221187904.

The previous prime is 400247644627. The next prime is 400247644711. The reversal of 400247644641 is 146446742004.

It is a de Polignac number, because none of the positive numbers 2^k-400247644641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400247644593 and 400247644602.

It is not an unprimeable number, because it can be changed into a prime (400247644541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22596346 + ... + 22614051.

It is an arithmetic number, because the mean of its divisors is an integer number (36077897604).

Almost surely, 2^400247644641 is an apocalyptic number.

It is an amenable number.

400247644641 is a deficient number, since it is larger than the sum of its proper divisors (176998717023).

400247644641 is a wasteful number, since it uses less digits than its factorization.

400247644641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45210640.

The product of its (nonzero) digits is 516096, while the sum is 42.

The spelling of 400247644641 in words is "four hundred billion, two hundred forty-seven million, six hundred forty-four thousand, six hundred forty-one".