15511505651660 has 48 divisors (see below), whose sum is σ = 32725577828160. Its totient is φ = 6175776318720.

The previous prime is 15511505651633. The next prime is 15511505651671. The reversal of 15511505651660 is 6615650511551.

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 15 ways as a sum of consecutive naturals, for example, 15928097 + ... + 16873863.

It is an arithmetic number, because the mean of its divisors is an integer number (681782871420).

Almost surely, 2^{15511505651660} is an apocalyptic number.

15511505651660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15511505651660 is an abundant number, since it is smaller than the sum of its proper divisors (17214072176500).

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

15511505651660 is a wasteful number, since it uses less digits than its factorization.

15511505651660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949586 (or 949584 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 47.

The spelling of 15511505651660 in words is "fifteen trillion, five hundred eleven billion, five hundred five million, six hundred fifty-one thousand, six hundred sixty".