397039772664 has 24 divisors (see below), whose sum is σ = 1075316051160. Its totient is φ = 132346590864.

The previous prime is 397039772659. The next prime is 397039772669. The reversal of 397039772664 is 466277930793.

397039772664 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (397039772659) and next prime (397039772669).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397039772669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2757220572 + ... + 2757220715.

It is an arithmetic number, because the mean of its divisors is an integer number (44804835465).

Almost surely, 2^397039772664 is an apocalyptic number.

It is an amenable number.

397039772664 is an abundant number, since it is smaller than the sum of its proper divisors (678276278496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397039772664 is a wasteful number, since it uses less digits than its factorization.

397039772664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514441299 (or 5514441292 counting only the distinct ones).

The product of its (nonzero) digits is 72013536, while the sum is 63.

The spelling of 397039772664 in words is "three hundred ninety-seven billion, thirty-nine million, seven hundred seventy-two thousand, six hundred sixty-four".