400681316983 has 4 divisors (see below), whose sum is σ = 401007340440. Its totient is φ = 400355293528.

The previous prime is 400681316957. The next prime is 400681317013. The reversal of 400681316983 is 389613186004.

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 400681316983 - 2³³ = 392091382391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400681316933) 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, 163009885 + ... + 163012342.

It is an arithmetic number, because the mean of its divisors is an integer number (100251835110).

Almost surely, 2^400681316983 is an apocalyptic number.

400681316983 is a deficient number, since it is larger than the sum of its proper divisors (326023457).

400681316983 is a wasteful number, since it uses less digits than its factorization.

400681316983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326023456.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 400681316983 in words is "four hundred billion, six hundred eighty-one million, three hundred sixteen thousand, nine hundred eighty-three".