155847894091 has 4 divisors (see below), whose sum is σ = 155864105800. Its totient is φ = 155831682384.

The previous prime is 155847893983. The next prime is 155847894101. The reversal of 155847894091 is 190498748551.

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

It is a cyclic number.

It is not a de Polignac number, because 155847894091 - 2³⁷ = 18408940619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155847834091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8091426 + ... + 8110663.

It is an arithmetic number, because the mean of its divisors is an integer number (38966026450).

Almost surely, 2^155847894091 is an apocalyptic number.

155847894091 is a deficient number, since it is larger than the sum of its proper divisors (16211709).

155847894091 is an equidigital number, since it uses as much as digits as its factorization.

155847894091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16211708.

The product of its (nonzero) digits is 14515200, while the sum is 61.

The spelling of 155847894091 in words is "one hundred fifty-five billion, eight hundred forty-seven million, eight hundred ninety-four thousand, ninety-one".