401262644871 has 24 divisors (see below), whose sum is σ = 632359927056. Its totient is φ = 243163607040.

The previous prime is 401262644831. The next prime is 401262644891. The reversal of 401262644871 is 178446262104.

401262644871 is a `hidden beast` number, since 4 + 0 + 12 + 626 + 4 + 4 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 401262644871 - 2⁷ = 401262644743 is a prime.

It is a super-2 number, since 2×401262644871² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401262644831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 740871 + ... + 1162503.

It is an arithmetic number, because the mean of its divisors is an integer number (26348330294).

Almost surely, 2^401262644871 is an apocalyptic number.

401262644871 is a deficient number, since it is larger than the sum of its proper divisors (231097282185).

401262644871 is a wasteful number, since it uses less digits than its factorization.

401262644871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431263 (or 431260 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 401262644871 in words is "four hundred one billion, two hundred sixty-two million, six hundred forty-four thousand, eight hundred seventy-one".