155552908947 has 4 divisors (see below), whose sum is σ = 207403878600. Its totient is φ = 103701939296.

The previous prime is 155552908943. The next prime is 155552908961. The reversal of 155552908947 is 749809255551.

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 155552908947 - 2² = 155552908943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155552908943) 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, 25925484822 + ... + 25925484827.

It is an arithmetic number, because the mean of its divisors is an integer number (51850969650).

Almost surely, 2^155552908947 is an apocalyptic number.

155552908947 is a deficient number, since it is larger than the sum of its proper divisors (51850969653).

155552908947 is an equidigital number, since it uses as much as digits as its factorization.

155552908947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51850969652.

The product of its (nonzero) digits is 22680000, while the sum is 60.

The spelling of 155552908947 in words is "one hundred fifty-five billion, five hundred fifty-two million, nine hundred eight thousand, nine hundred forty-seven".