631719243779 has 32 divisors (see below), whose sum is σ = 690383736000. Its totient is φ = 577988566272.

The previous prime is 631719243767. The next prime is 631719243781. The reversal of 631719243779 is 977342917136.

It is not a de Polignac number, because 631719243779 - 2⁴ = 631719243763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631719243719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247053569 + ... + 247056125.

It is an arithmetic number, because the mean of its divisors is an integer number (21574491750).

Almost surely, 2^631719243779 is an apocalyptic number.

631719243779 is a deficient number, since it is larger than the sum of its proper divisors (58664492221).

631719243779 is a wasteful number, since it uses less digits than its factorization.

631719243779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544 (or 3518 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 59.

The spelling of 631719243779 in words is "six hundred thirty-one billion, seven hundred nineteen million, two hundred forty-three thousand, seven hundred seventy-nine".