113621337367561 has 9 divisors (see below), whose sum is σ = 113762930765031. Its totient is φ = 113479920023184.

The previous prime is 113621337367553. The next prime is 113621337367583. The reversal of 113621337367561 is 165763733126311.

The square root of 113621337367561 is 10659331.

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

It can be written as a sum of positive squares in only one way, i.e., 3073776861961 + 110547560505600 = 1753219^2 + 10514160^2 .

It is not a de Polignac number, because 113621337367561 - 2³ = 113621337367553 is a prime.

It is a super-2 number, since 2×113621337367561² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113621337367511) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9156359125 + ... + 9156371533.

It is an arithmetic number, because the mean of its divisors is an integer number (12640325640559).

Almost surely, 2^{113621337367561} is an apocalyptic number.

113621337367561 is the 10659331-st square number.

113621337367561 is the 5329666-th centered octagonal number.

It is an amenable number.

113621337367561 is a deficient number, since it is larger than the sum of its proper divisors (141593397470).

113621337367561 is an frugal number, since it uses more digits than its factorization.

113621337367561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26536 (or 13268 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 55.

The spelling of 113621337367561 in words is "one hundred thirteen trillion, six hundred twenty-one billion, three hundred thirty-seven million, three hundred sixty-seven thousand, five hundred sixty-one".