400451627643 has 4 divisors (see below), whose sum is σ = 533935503528. Its totient is φ = 266967751760.

The previous prime is 400451627621. The next prime is 400451627677. The reversal of 400451627643 is 346726154004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400451627643 - 2²¹ = 400449530491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400451627595 and 400451627604.

It is not an unprimeable number, because it can be changed into a prime (400451627243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66741937938 + ... + 66741937943.

It is an arithmetic number, because the mean of its divisors is an integer number (133483875882).

Almost surely, 2^400451627643 is an apocalyptic number.

400451627643 is a deficient number, since it is larger than the sum of its proper divisors (133483875885).

400451627643 is a wasteful number, since it uses less digits than its factorization.

400451627643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133483875884.

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 400451627643 in words is "four hundred billion, four hundred fifty-one million, six hundred twenty-seven thousand, six hundred forty-three".