915990506419 has 2 divisors, whose sum is σ = 915990506420. Its totient is φ = 915990506418.

The previous prime is 915990506377. The next prime is 915990506477. The reversal of 915990506419 is 914605099519.

It is an a-pointer prime, because the next prime (915990506477) can be obtained adding 915990506419 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 915990506419 - 2²³ = 915982117811 is a prime.

It is a super-2 number, since 2×915990506419² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (915990506479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457995253209 + 457995253210.

It is an arithmetic number, because the mean of its divisors is an integer number (457995253210).

Almost surely, 2^915990506419 is an apocalyptic number.

915990506419 is a deficient number, since it is larger than the sum of its proper divisors (1).

915990506419 is an equidigital number, since it uses as much as digits as its factorization.

915990506419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3936600, while the sum is 58.

The spelling of 915990506419 in words is "nine hundred fifteen billion, nine hundred ninety million, five hundred six thousand, four hundred nineteen".