615561151 has 2 divisors, whose sum is σ = 615561152. Its totient is φ = 615561150.

The previous prime is 615561097. The next prime is 615561157. The reversal of 615561151 is 151165516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 615561151 - 2¹⁵ = 615528383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615561157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307780575 + 307780576.

It is an arithmetic number, because the mean of its divisors is an integer number (307780576).

Almost surely, 2^615561151 is an apocalyptic number.

615561151 is a deficient number, since it is larger than the sum of its proper divisors (1).

615561151 is an equidigital number, since it uses as much as digits as its factorization.

615561151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 31.

The square root of 615561151 is about 24810.5048517760. The cubic root of 615561151 is about 850.6620682616.

The spelling of 615561151 in words is "six hundred fifteen million, five hundred sixty-one thousand, one hundred fifty-one".