156523136461 has 2 divisors, whose sum is σ = 156523136462. Its totient is φ = 156523136460.

The previous prime is 156523136459. The next prime is 156523136467. The reversal of 156523136461 is 164631325651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153649104361 + 2874032100 = 391981^2 + 53610^2 .

It is a cyclic number.

It is not a de Polignac number, because 156523136461 - 2¹ = 156523136459 is a prime.

Together with 156523136459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156523136467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78261568230 + 78261568231.

It is an arithmetic number, because the mean of its divisors is an integer number (78261568231).

Almost surely, 2^156523136461 is an apocalyptic number.

It is an amenable number.

156523136461 is a deficient number, since it is larger than the sum of its proper divisors (1).

156523136461 is an equidigital number, since it uses as much as digits as its factorization.

156523136461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 43.

The spelling of 156523136461 in words is "one hundred fifty-six billion, five hundred twenty-three million, one hundred thirty-six thousand, four hundred sixty-one".