642525371519 has 2 divisors, whose sum is σ = 642525371520. Its totient is φ = 642525371518.

The previous prime is 642525371483. The next prime is 642525371549. The reversal of 642525371519 is 915173525246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642525371519 - 2¹² = 642525367423 is a prime.

It is a super-2 number, since 2×642525371519² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642525371549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321262685759 + 321262685760.

It is an arithmetic number, because the mean of its divisors is an integer number (321262685760).

Almost surely, 2^642525371519 is an apocalyptic number.

642525371519 is a deficient number, since it is larger than the sum of its proper divisors (1).

642525371519 is an equidigital number, since it uses as much as digits as its factorization.

642525371519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 50.

The spelling of 642525371519 in words is "six hundred forty-two billion, five hundred twenty-five million, three hundred seventy-one thousand, five hundred nineteen".