157491133811 has 8 divisors (see below), whose sum is σ = 171812768448. Its totient is φ = 143170209000.

The previous prime is 157491133757. The next prime is 157491133843. The reversal of 157491133811 is 118331194751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157491133811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157491133411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356276 + ... + 664766.

It is an arithmetic number, because the mean of its divisors is an integer number (21476596056).

Almost surely, 2^157491133811 is an apocalyptic number.

157491133811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157491133811 is a deficient number, since it is larger than the sum of its proper divisors (14321634637).

157491133811 is a wasteful number, since it uses less digits than its factorization.

157491133811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354913.

The product of its digits is 90720, while the sum is 44.

The spelling of 157491133811 in words is "one hundred fifty-seven billion, four hundred ninety-one million, one hundred thirty-three thousand, eight hundred eleven".