631761561245 has 16 divisors (see below), whose sum is σ = 762108848832. Its totient is φ = 502746393600.

The previous prime is 631761561239. The next prime is 631761561251. The reversal of 631761561245 is 542165167136.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (631761561239) and next prime (631761561251).

It is not a de Polignac number, because 631761561245 - 2⁴ = 631761561229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631761561245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15074570 + ... + 15116420.

It is an arithmetic number, because the mean of its divisors is an integer number (47631803052).

Almost surely, 2^631761561245 is an apocalyptic number.

It is an amenable number.

631761561245 is a deficient number, since it is larger than the sum of its proper divisors (130347287587).

631761561245 is a wasteful number, since it uses less digits than its factorization.

631761561245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57692.

The product of its digits is 907200, while the sum is 47.

The spelling of 631761561245 in words is "six hundred thirty-one billion, seven hundred sixty-one million, five hundred sixty-one thousand, two hundred forty-five".