515154607480979 has 2 divisors, whose sum is σ = 515154607480980. Its totient is φ = 515154607480978.

The previous prime is 515154607480963. The next prime is 515154607481009. The reversal of 515154607480979 is 979084706451515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 515154607480979 - 2⁴ = 515154607480963 is a prime.

It is not a weakly prime, because it can be changed into another prime (515154607480939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257577303740489 + 257577303740490.

It is an arithmetic number, because the mean of its divisors is an integer number (257577303740490).

Almost surely, 2^{515154607480979} is an apocalyptic number.

515154607480979 is a deficient number, since it is larger than the sum of its proper divisors (1).

515154607480979 is an equidigital number, since it uses as much as digits as its factorization.

515154607480979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024000, while the sum is 71.

The spelling of 515154607480979 in words is "five hundred fifteen trillion, one hundred fifty-four billion, six hundred seven million, four hundred eighty thousand, nine hundred seventy-nine".