161542022415 has 16 divisors (see below), whose sum is σ = 258472519776. Its totient is φ = 86153984000.

The previous prime is 161542022381. The next prime is 161542022437. The reversal of 161542022415 is 514220245161.

It is a happy number.

It is not a de Polignac number, because 161542022415 - 2¹³ = 161542014223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027015 + ... + 1173815.

It is an arithmetic number, because the mean of its divisors is an integer number (16154532486).

Almost surely, 2^161542022415 is an apocalyptic number.

161542022415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161542022415 is a deficient number, since it is larger than the sum of its proper divisors (96930497361).

161542022415 is a wasteful number, since it uses less digits than its factorization.

161542022415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220170.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 161542022415 its reverse (514220245161), we get a palindrome (675762267576).

The spelling of 161542022415 in words is "one hundred sixty-one billion, five hundred forty-two million, twenty-two thousand, four hundred fifteen".