615255442379 has 2 divisors, whose sum is σ = 615255442380. Its totient is φ = 615255442378.

The previous prime is 615255442339. The next prime is 615255442447. The reversal of 615255442379 is 973244552516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615255442379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 615255442379.

It is not a weakly prime, because it can be changed into another prime (615255442339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307627721189 + 307627721190.

It is an arithmetic number, because the mean of its divisors is an integer number (307627721190).

Almost surely, 2^615255442379 is an apocalyptic number.

615255442379 is a deficient number, since it is larger than the sum of its proper divisors (1).

615255442379 is an equidigital number, since it uses as much as digits as its factorization.

615255442379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072000, while the sum is 53.

The spelling of 615255442379 in words is "six hundred fifteen billion, two hundred fifty-five million, four hundred forty-two thousand, three hundred seventy-nine".