1155712511555 has 32 divisors (see below), whose sum is σ = 1678403566080. Its totient is φ = 745786068480.

The previous prime is 1155712511537. The next prime is 1155712511561. The reversal of 1155712511555 is 5551152175511.

It is a happy number.

It is not a de Polignac number, because 1155712511555 - 2⁸ = 1155712511299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5302316 + ... + 5515974.

It is an arithmetic number, because the mean of its divisors is an integer number (52450111440).

Almost surely, 2^{1155712511555} is an apocalyptic number.

1155712511555 is a deficient number, since it is larger than the sum of its proper divisors (522691054525).

1155712511555 is a wasteful number, since it uses less digits than its factorization.

1155712511555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222779.

The product of its digits is 218750, while the sum is 44.

The spelling of 1155712511555 in words is "one trillion, one hundred fifty-five billion, seven hundred twelve million, five hundred eleven thousand, five hundred fifty-five".