15661225335 has 32 divisors (see below), whose sum is σ = 28643880960. Its totient is φ = 7157864448.

The previous prime is 15661225313. The next prime is 15661225351. The reversal of 15661225335 is 53352216651.

It is not a de Polignac number, because 15661225335 - 2⁶ = 15661225271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15661225293 and 15661225302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 571354 + ... + 598136.

It is an arithmetic number, because the mean of its divisors is an integer number (895121280).

Almost surely, 2^15661225335 is an apocalyptic number.

15661225335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15661225335 is a deficient number, since it is larger than the sum of its proper divisors (12982655625).

15661225335 is a wasteful number, since it uses less digits than its factorization.

15661225335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32367.

The product of its digits is 162000, while the sum is 39.

The spelling of 15661225335 in words is "fifteen billion, six hundred sixty-one million, two hundred twenty-five thousand, three hundred thirty-five".