15140002561 has 2 divisors, whose sum is σ = 15140002562. Its totient is φ = 15140002560.

The previous prime is 15140002519. The next prime is 15140002589. The reversal of 15140002561 is 16520004151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13344870400 + 1795132161 = 115520^2 + 42369^2 .

It is a cyclic number.

It is not a de Polignac number, because 15140002561 - 2⁷ = 15140002433 is a prime.

It is not a weakly prime, because it can be changed into another prime (15140002861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7570001280 + 7570001281.

It is an arithmetic number, because the mean of its divisors is an integer number (7570001281).

Almost surely, 2^15140002561 is an apocalyptic number.

It is an amenable number.

15140002561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15140002561 is an equidigital number, since it uses as much as digits as its factorization.

15140002561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 15140002561 in words is "fifteen billion, one hundred forty million, two thousand, five hundred sixty-one".