136898915545161 has 81 divisors (see below), whose sum is σ = 252845059066509. Its totient is φ = 71114915718000.

The previous prime is 136898915545151. The next prime is 136898915545219. The reversal of 136898915545161 is 161545519898631.

The square root of 136898915545161 is 11700381.

It is a perfect power (a square), and thus also a powerful number.

136898915545161 is a `hidden beast` number, since 1 + 3 + 6 + 8 + 9 + 8 + 9 + 1 + 554 + 5 + 1 + 61 = 666.

It is not a de Polignac number, because 136898915545161 - 2¹³ = 136898915536969 is a prime.

It is a super-2 number, since 2×136898915545161² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136898915545161.

It is not an unprimeable number, because it can be changed into a prime (136898915545151) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2702762686 + ... + 2702813336.

Almost surely, 2^{136898915545161} is an apocalyptic number.

136898915545161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136898915545161 is the 11700381-st square number.

136898915545161 is the 5850191-st centered octagonal number.

It is an amenable number.

136898915545161 is a deficient number, since it is larger than the sum of its proper divisors (115946143521348).

136898915545161 is an frugal number, since it uses more digits than its factorization.

136898915545161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101344 (or 50672 counting only the distinct ones).

The product of its digits is 279936000, while the sum is 72.

The spelling of 136898915545161 in words is "one hundred thirty-six trillion, eight hundred ninety-eight billion, nine hundred fifteen million, five hundred forty-five thousand, one hundred sixty-one".