161340615525 has 24 divisors (see below), whose sum is σ = 266767595424. Its totient is φ = 86042593600.

The previous prime is 161340615511. The next prime is 161340615571. The reversal of 161340615525 is 525516043161.

It is not a de Polignac number, because 161340615525 - 2⁴ = 161340615509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1213855 + ... + 1340195.

It is an arithmetic number, because the mean of its divisors is an integer number (11115316476).

Almost surely, 2^161340615525 is an apocalyptic number.

161340615525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161340615525 is a deficient number, since it is larger than the sum of its proper divisors (105426979899).

161340615525 is a wasteful number, since it uses less digits than its factorization.

161340615525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143381 (or 143376 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

Adding to 161340615525 its reverse (525516043161), we get a palindrome (686856658686).

The spelling of 161340615525 in words is "one hundred sixty-one billion, three hundred forty million, six hundred fifteen thousand, five hundred twenty-five".