161958908415 has 48 divisors (see below), whose sum is σ = 267596542080. Its totient is φ = 83642993280.

The previous prime is 161958908413. The next prime is 161958908459. The reversal of 161958908415 is 514809859161.

It is not a de Polignac number, because 161958908415 - 2¹ = 161958908413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161958908413) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4314196 + ... + 4351574.

It is an arithmetic number, because the mean of its divisors is an integer number (5574927960).

Almost surely, 2^161958908415 is an apocalyptic number.

161958908415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161958908415 is a deficient number, since it is larger than the sum of its proper divisors (105637633665).

161958908415 is a wasteful number, since it uses less digits than its factorization.

161958908415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37672 (or 37635 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 57.

The spelling of 161958908415 in words is "one hundred sixty-one billion, nine hundred fifty-eight million, nine hundred eight thousand, four hundred fifteen".