15515651655516 has 48 divisors (see below), whose sum is σ = 36222005409408. Its totient is φ = 5169196296000.

The previous prime is 15515651655461. The next prime is 15515651655571. The reversal of 15515651655516 is 61555615651551.

It is an interprime number because it is at equal distance from previous prime (15515651655461) and next prime (15515651655571).

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 15 ways as a sum of consecutive naturals, for example, 186977451 + ... + 187060413.

It is an arithmetic number, because the mean of its divisors is an integer number (754625112696).

Almost surely, 2^{15515651655516} is an apocalyptic number.

It is an amenable number.

15515651655516 is an abundant number, since it is smaller than the sum of its proper divisors (20706353753892).

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

15515651655516 is a wasteful number, since it uses less digits than its factorization.

15515651655516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90882 (or 90880 counting only the distinct ones).

The product of its digits is 16875000, while the sum is 57.

The spelling of 15515651655516 in words is "fifteen trillion, five hundred fifteen billion, six hundred fifty-one million, six hundred fifty-five thousand, five hundred sixteen".