1631620968734 has 16 divisors (see below), whose sum is σ = 2455289193600. Its totient is φ = 813191525664.

The previous prime is 1631620968727. The next prime is 1631620968743. The reversal of 1631620968734 is 4378690261361.

It is a super-2 number, since 2×1631620968734² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1631620968734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13226612 + ... + 13349400.

It is an arithmetic number, because the mean of its divisors is an integer number (153455574600).

Almost surely, 2^{1631620968734} is an apocalyptic number.

1631620968734 is a deficient number, since it is larger than the sum of its proper divisors (823668224866).

1631620968734 is a wasteful number, since it uses less digits than its factorization.

1631620968734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144067.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 1631620968734 in words is "one trillion, six hundred thirty-one billion, six hundred twenty million, nine hundred sixty-eight thousand, seven hundred thirty-four".