156894136522 has 4 divisors (see below), whose sum is σ = 235341204786. Its totient is φ = 78447068260.

The previous prime is 156894136517. The next prime is 156894136561. The reversal of 156894136522 is 225631498651.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 112861730601 + 44032405921 = 335949^2 + 209839^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 156894136522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39223534129 + ... + 39223534132.

Almost surely, 2^156894136522 is an apocalyptic number.

156894136522 is a deficient number, since it is larger than the sum of its proper divisors (78447068264).

156894136522 is an equidigital number, since it uses as much as digits as its factorization.

156894136522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78447068263.

The product of its digits is 3110400, while the sum is 52.

The spelling of 156894136522 in words is "one hundred fifty-six billion, eight hundred ninety-four million, one hundred thirty-six thousand, five hundred twenty-two".