19257415061 has 2 divisors, whose sum is σ = 19257415062. Its totient is φ = 19257415060.

The previous prime is 19257414973. The next prime is 19257415063. The reversal of 19257415061 is 16051475291.

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., 11617606225 + 7639808836 = 107785^2 + 87406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19257415061 is a prime.

Together with 19257415063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19257415063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9628707530 + 9628707531.

It is an arithmetic number, because the mean of its divisors is an integer number (9628707531).

Almost surely, 2^19257415061 is an apocalyptic number.

It is an amenable number.

19257415061 is a deficient number, since it is larger than the sum of its proper divisors (1).

19257415061 is an equidigital number, since it uses as much as digits as its factorization.

19257415061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 19257415061 in words is "nineteen billion, two hundred fifty-seven million, four hundred fifteen thousand, sixty-one".