15625000019 has 2 divisors, whose sum is σ = 15625000020. Its totient is φ = 15625000018.

The previous prime is 15625000007. The next prime is 15625000049. The reversal of 15625000019 is 91000052651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15625000019 - 2²⁰ = 15623951443 is a prime.

It is a super-2 number, since 2×15625000019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15624999955 and 15625000000.

It is not a weakly prime, because it can be changed into another prime (15625000049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7812500009 + 7812500010.

It is an arithmetic number, because the mean of its divisors is an integer number (7812500010).

Almost surely, 2^15625000019 is an apocalyptic number.

15625000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

15625000019 is an equidigital number, since it uses as much as digits as its factorization.

15625000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 15625000019 in words is "fifteen billion, six hundred twenty-five million, nineteen", and thus it is an aban number.