915871874641 has 2 divisors, whose sum is σ = 915871874642. Its totient is φ = 915871874640.

The previous prime is 915871874639. The next prime is 915871874683. The reversal of 915871874641 is 146478178519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 914182664641 + 1689210000 = 956129^2 + 41100^2 .

It is an emirp because it is prime and its reverse (146478178519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 915871874641 - 2¹ = 915871874639 is a prime.

Together with 915871874639, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 915871874641.

It is not a weakly prime, because it can be changed into another prime (915871871641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457935937320 + 457935937321.

It is an arithmetic number, because the mean of its divisors is an integer number (457935937321).

Almost surely, 2^915871874641 is an apocalyptic number.

It is an amenable number.

915871874641 is a deficient number, since it is larger than the sum of its proper divisors (1).

915871874641 is an equidigital number, since it uses as much as digits as its factorization.

915871874641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 61.

The spelling of 915871874641 in words is "nine hundred fifteen billion, eight hundred seventy-one million, eight hundred seventy-four thousand, six hundred forty-one".