155259234899 has 4 divisors (see below), whose sum is σ = 157804468320. Its totient is φ = 152714001480.

The previous prime is 155259234859. The next prime is 155259234917. The reversal of 155259234899 is 998432952551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998432952551 = 149 ⋅6700892299.

It is a cyclic number.

It is not a de Polignac number, because 155259234899 - 2⁸ = 155259234643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155259234829) 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, 1272616619 + ... + 1272616740.

It is an arithmetic number, because the mean of its divisors is an integer number (39451117080).

Almost surely, 2^155259234899 is an apocalyptic number.

155259234899 is a deficient number, since it is larger than the sum of its proper divisors (2545233421).

155259234899 is an equidigital number, since it uses as much as digits as its factorization.

155259234899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545233420.

The product of its digits is 34992000, while the sum is 62.

The spelling of 155259234899 in words is "one hundred fifty-five billion, two hundred fifty-nine million, two hundred thirty-four thousand, eight hundred ninety-nine".