621431201318 has 16 divisors (see below), whose sum is σ = 951125121936. Its totient is φ = 304406662560.

The previous prime is 621431201317. The next prime is 621431201351. The reversal of 621431201318 is 813102134126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621431201311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4219373 + ... + 4364168.

It is an arithmetic number, because the mean of its divisors is an integer number (59445320121).

Almost surely, 2^621431201318 is an apocalyptic number.

621431201318 is a deficient number, since it is larger than the sum of its proper divisors (329693920618).

621431201318 is a wasteful number, since it uses less digits than its factorization.

621431201318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584279.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 621431201318 in words is "six hundred twenty-one billion, four hundred thirty-one million, two hundred one thousand, three hundred eighteen".