15505655483720 has 64 divisors (see below), whose sum is σ = 34924370670000. Its totient is φ = 6195749075968.

The previous prime is 15505655483653. The next prime is 15505655483767. The reversal of 15505655483720 is 2738455650551.

It can be written as a sum of positive squares in 8 ways, for example, as 1982987810596 + 13522667673124 = 1408186^2 + 3677318^2 .

It is a super-2 number, since 2×15505655483720² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352595654 + ... + 352639626.

Almost surely, 2^{15505655483720} is an apocalyptic number.

15505655483720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15505655483720 is an abundant number, since it is smaller than the sum of its proper divisors (19418715186280).

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

15505655483720 is a wasteful number, since it uses less digits than its factorization.

15505655483720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53042 (or 53038 counting only the distinct ones).

The product of its (nonzero) digits is 25200000, while the sum is 56.

The spelling of 15505655483720 in words is "fifteen trillion, five hundred five billion, six hundred fifty-five million, four hundred eighty-three thousand, seven hundred twenty".