15551161505 has 8 divisors (see below), whose sum is σ = 20357884224. Its totient is φ = 11309935600.

The previous prime is 15551161499. The next prime is 15551161529. The reversal of 15551161505 is 50516115551.

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

It is not a de Polignac number, because 15551161505 - 2⁶ = 15551161441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141374141 + ... + 141374250.

It is an arithmetic number, because the mean of its divisors is an integer number (2544735528).

Almost surely, 2^15551161505 is an apocalyptic number.

It is an amenable number.

15551161505 is a deficient number, since it is larger than the sum of its proper divisors (4806722719).

15551161505 is a wasteful number, since it uses less digits than its factorization.

15551161505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282748407.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 15551161505 in words is "fifteen billion, five hundred fifty-one million, one hundred sixty-one thousand, five hundred five".