2157558644519 has 2 divisors, whose sum is σ = 2157558644520. Its totient is φ = 2157558644518.

The previous prime is 2157558644459. The next prime is 2157558644599. The reversal of 2157558644519 is 9154468557512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2157558644519 - 2⁴⁰ = 1058047016743 is a prime.

It is a super-2 number, since 2×2157558644519² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157558644599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078779322259 + 1078779322260.

It is an arithmetic number, because the mean of its divisors is an integer number (1078779322260).

Almost surely, 2^{2157558644519} is an apocalyptic number.

2157558644519 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157558644519 is an equidigital number, since it uses as much as digits as its factorization.

2157558644519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480000, while the sum is 62.

The spelling of 2157558644519 in words is "two trillion, one hundred fifty-seven billion, five hundred fifty-eight million, six hundred forty-four thousand, five hundred nineteen".