615364261 has 2 divisors, whose sum is σ = 615364262. Its totient is φ = 615364260.

The previous prime is 615364223. The next prime is 615364273. The reversal of 615364261 is 162463516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450755361 + 164608900 = 21231^2 + 12830^2 .

It is a cyclic number.

It is not a de Polignac number, because 615364261 - 2¹⁷ = 615233189 is a prime.

It is a super-2 number, since 2×615364261² = 757346347432152242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615364361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307682130 + 307682131.

It is an arithmetic number, because the mean of its divisors is an integer number (307682131).

Almost surely, 2^615364261 is an apocalyptic number.

It is an amenable number.

615364261 is a deficient number, since it is larger than the sum of its proper divisors (1).

615364261 is an equidigital number, since it uses as much as digits as its factorization.

615364261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 615364261 is about 24806.5366587116. The cubic root of 615364261 is about 850.5713625618.

The spelling of 615364261 in words is "six hundred fifteen million, three hundred sixty-four thousand, two hundred sixty-one".