15120620017 has 2 divisors, whose sum is σ = 15120620018. Its totient is φ = 15120620016.

The previous prime is 15120619991. The next prime is 15120620041. The reversal of 15120620017 is 71002602151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15120145296 + 474721 = 122964^2 + 689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15120620017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15120619973 and 15120620000.

It is not a weakly prime, because it can be changed into another prime (15120620917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560310008 + 7560310009.

It is an arithmetic number, because the mean of its divisors is an integer number (7560310009).

Almost surely, 2^15120620017 is an apocalyptic number.

It is an amenable number.

15120620017 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120620017 is an equidigital number, since it uses as much as digits as its factorization.

15120620017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 15120620017 in words is "fifteen billion, one hundred twenty million, six hundred twenty thousand, seventeen".