156938942002 has 4 divisors (see below), whose sum is σ = 235408413006. Its totient is φ = 78469471000.

The previous prime is 156938941979. The next prime is 156938942081. The reversal of 156938942002 is 200249839651.

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., 78539502001 + 78399440001 = 280249^2 + 279999^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39234735499 + ... + 39234735502.

Almost surely, 2^156938942002 is an apocalyptic number.

156938942002 is a deficient number, since it is larger than the sum of its proper divisors (78469471004).

156938942002 is an equidigital number, since it uses as much as digits as its factorization.

156938942002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78469471003.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 156938942002 in words is "one hundred fifty-six billion, nine hundred thirty-eight million, nine hundred forty-two thousand, two".