1553660641560 has 32 divisors (see below), whose sum is σ = 4660981925040. Its totient is φ = 414309504384.

The previous prime is 1553660641553. The next prime is 1553660641669. The reversal of 1553660641560 is 651460663551.

It is a super-2 number, since 2×1553660641560² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6473585887 + ... + 6473586126.

Almost surely, 2^{1553660641560} is an apocalyptic number.

1553660641560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553660641560 is an abundant number, since it is smaller than the sum of its proper divisors (3107321283480).

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

1553660641560 is a wasteful number, since it uses less digits than its factorization.

1553660641560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12947172027 (or 12947172023 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 1553660641560 in words is "one trillion, five hundred fifty-three billion, six hundred sixty million, six hundred forty-one thousand, five hundred sixty".