1631610352644 has 24 divisors (see below), whose sum is σ = 3807112558368. Its totient is φ = 543867012480.

The previous prime is 1631610352613. The next prime is 1631610352667. The reversal of 1631610352644 is 4462530161361.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1631610352596 and 1631610352605.

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, 2949004 + ... + 3458300.

It is an arithmetic number, because the mean of its divisors is an integer number (158629689932).

Almost surely, 2^{1631610352644} is an apocalyptic number.

It is an amenable number.

1631610352644 is an abundant number, since it is smaller than the sum of its proper divisors (2175502205724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631610352644 is a wasteful number, since it uses less digits than its factorization.

1631610352644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776275 (or 776273 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 1631610352644 in words is "one trillion, six hundred thirty-one billion, six hundred ten million, three hundred fifty-two thousand, six hundred forty-four".