156494381903 has 4 divisors (see below), whose sum is σ = 163298485488. Its totient is φ = 149690278320.

The previous prime is 156494381873. The next prime is 156494381921. The reversal of 156494381903 is 309183494651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309183494651 = 23 ⋅13442760637.

It is a cyclic number.

It is not a de Polignac number, because 156494381903 - 2⁸ = 156494381647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156494381203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3402051758 + ... + 3402051803.

It is an arithmetic number, because the mean of its divisors is an integer number (40824621372).

Almost surely, 2^156494381903 is an apocalyptic number.

156494381903 is a deficient number, since it is larger than the sum of its proper divisors (6804103585).

156494381903 is an equidigital number, since it uses as much as digits as its factorization.

156494381903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6804103584.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 156494381903 in words is "one hundred fifty-six billion, four hundred ninety-four million, three hundred eighty-one thousand, nine hundred three".