1155550651555 has 64 divisors (see below), whose sum is σ = 1486879833600. Its totient is φ = 859620003840.

The previous prime is 1155550651537. The next prime is 1155550651561. The reversal of 1155550651555 is 5551560555511.

It is a happy number.

It is not a de Polignac number, because 1155550651555 - 2¹³ = 1155550643363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155550651499 and 1155550651508.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 986806120 + ... + 986807290.

It is an arithmetic number, because the mean of its divisors is an integer number (23232497400).

Almost surely, 2^{1155550651555} is an apocalyptic number.

1155550651555 is a deficient number, since it is larger than the sum of its proper divisors (331329182045).

1155550651555 is a wasteful number, since it uses less digits than its factorization.

1155550651555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its (nonzero) digits is 2343750, while the sum is 49.

The spelling of 1155550651555 in words is "one trillion, one hundred fifty-five billion, five hundred fifty million, six hundred fifty-one thousand, five hundred fifty-five".