531400400018 has 16 divisors (see below), whose sum is σ = 819238116480. Its totient is φ = 258421424976.

The previous prime is 531400399961. The next prime is 531400400039. The reversal of 531400400018 is 810004004135.

It is a self number, because there is not a number n which added to its sum of digits gives 531400400018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25088621 + ... + 25109792.

It is an arithmetic number, because the mean of its divisors is an integer number (51202382280).

Almost surely, 2^531400400018 is an apocalyptic number.

531400400018 is a deficient number, since it is larger than the sum of its proper divisors (287837716462).

531400400018 is a wasteful number, since it uses less digits than its factorization.

531400400018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50198561.

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 531400400018 in words is "five hundred thirty-one billion, four hundred million, four hundred thousand, eighteen".