631097863892 has 6 divisors (see below), whose sum is σ = 1104421261818. Its totient is φ = 315548931944.

The previous prime is 631097863873. The next prime is 631097863933. The reversal of 631097863892 is 298368790136.

631097863892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 622830326416 + 8267537476 = 789196^2 + 90926^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78887232983 + ... + 78887232990.

It is an arithmetic number, because the mean of its divisors is an integer number (184070210303).

Almost surely, 2^631097863892 is an apocalyptic number.

It is an amenable number.

631097863892 is a deficient number, since it is larger than the sum of its proper divisors (473323397926).

631097863892 is a wasteful number, since it uses less digits than its factorization.

631097863892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157774465977 (or 157774465975 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 631097863892 in words is "six hundred thirty-one billion, ninety-seven million, eight hundred sixty-three thousand, eight hundred ninety-two".