1631620968751 has 16 divisors (see below), whose sum is σ = 1727256176640. Its totient is φ = 1536969012480.

The previous prime is 1631620968749. The next prime is 1631620968793. The reversal of 1631620968751 is 1578690261361.

It is not a de Polignac number, because 1631620968751 - 2¹ = 1631620968749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1631620968692 and 1631620968701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631620978751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8149816 + ... + 8347618.

It is an arithmetic number, because the mean of its divisors is an integer number (107953511040).

Almost surely, 2^{1631620968751} is an apocalyptic number.

1631620968751 is a deficient number, since it is larger than the sum of its proper divisors (95635207889).

1631620968751 is a wasteful number, since it uses less digits than its factorization.

1631620968751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200286.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 1631620968751 in words is "one trillion, six hundred thirty-one billion, six hundred twenty million, nine hundred sixty-eight thousand, seven hundred fifty-one".