2156450057539 has 2 divisors, whose sum is σ = 2156450057540. Its totient is φ = 2156450057538.

The previous prime is 2156450057521. The next prime is 2156450057591. The reversal of 2156450057539 is 9357500546512.

It is an a-pointer prime, because the next prime (2156450057591) can be obtained adding 2156450057539 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156450057539 - 2¹¹ = 2156450055491 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156450057639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078225028769 + 1078225028770.

It is an arithmetic number, because the mean of its divisors is an integer number (1078225028770).

Almost surely, 2^{2156450057539} is an apocalyptic number.

2156450057539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156450057539 is an equidigital number, since it uses as much as digits as its factorization.

2156450057539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 2156450057539 in words is "two trillion, one hundred fifty-six billion, four hundred fifty million, fifty-seven thousand, five hundred thirty-nine".