2637340272121 has 3 divisors (see below), whose sum is σ = 2637341896111. Its totient is φ = 2637338648132.

The previous prime is 2637340272113. The next prime is 2637340272137. The reversal of 2637340272121 is 1212720437362.

The square root of 2637340272121 is 1623989.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 60609023721 + 2576731248400 = 246189^2 + 1605220^2 .

It is not a de Polignac number, because 2637340272121 - 2³ = 2637340272113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2637340272221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 811995 + ... + 2435983.

Almost surely, 2^{2637340272121} is an apocalyptic number.

2637340272121 is the 1623989-th square number.

2637340272121 is the 811995-th centered octagonal number.

It is an amenable number.

2637340272121 is a deficient number, since it is larger than the sum of its proper divisors (1623990).

2637340272121 is an frugal number, since it uses more digits than its factorization.

2637340272121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247978 (or 1623989 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 2637340272121 in words is "two trillion, six hundred thirty-seven billion, three hundred forty million, two hundred seventy-two thousand, one hundred twenty-one".