1641402557656 has 24 divisors (see below), whose sum is σ = 3163057086420. Its totient is φ = 798520157856.

The previous prime is 1641402557357. The next prime is 1641402557737. The reversal of 1641402557656 is 6567552041461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74925250 + ... + 74947153.

Almost surely, 2^{1641402557656} is an apocalyptic number.

It is an amenable number.

1641402557656 is a deficient number, since it is larger than the sum of its proper divisors (1521654528764).

1641402557656 is a wasteful number, since it uses less digits than its factorization.

1641402557656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149872483 (or 149872442 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 1641402557656 in words is "one trillion, six hundred forty-one billion, four hundred two million, five hundred fifty-seven thousand, six hundred fifty-six".