1556553650641 has 8 divisors (see below), whose sum is σ = 1698996185568. Its totient is φ = 1414267392000.

The previous prime is 1556553650627. The next prime is 1556553650671. The reversal of 1556553650641 is 1460563556551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1556553650641 - 2²¹ = 1556551553489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1556553650671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39048240 + ... + 39088081.

It is an arithmetic number, because the mean of its divisors is an integer number (212374523196).

Almost surely, 2^{1556553650641} is an apocalyptic number.

1556553650641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1556553650641 is a deficient number, since it is larger than the sum of its proper divisors (142442534927).

1556553650641 is a wasteful number, since it uses less digits than its factorization.

1556553650641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78138143.

The product of its (nonzero) digits is 8100000, while the sum is 52.

The spelling of 1556553650641 in words is "one trillion, five hundred fifty-six billion, five hundred fifty-three million, six hundred fifty thousand, six hundred forty-one".