1147556555 has 4 divisors (see below), whose sum is σ = 1377067872. Its totient is φ = 918045240.

The previous prime is 1147556539. The next prime is 1147556561. The reversal of 1147556555 is 5556557411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5556557411 = 883 ⋅6292817.

It is not a de Polignac number, because 1147556555 - 2⁴ = 1147556539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114755651 + ... + 114755660.

It is an arithmetic number, because the mean of its divisors is an integer number (344266968).

Almost surely, 2^1147556555 is an apocalyptic number.

1147556555 is a deficient number, since it is larger than the sum of its proper divisors (229511317).

1147556555 is an equidigital number, since it uses as much as digits as its factorization.

1147556555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229511316.

The product of its digits is 525000, while the sum is 44.

The square root of 1147556555 is about 33875.6041274543. The cubic root of 1147556555 is about 1046.9470062063.

The spelling of 1147556555 in words is "one billion, one hundred forty-seven million, five hundred fifty-six thousand, five hundred fifty-five".