1155551415 has 8 divisors (see below), whose sum is σ = 1848882288. Its totient is φ = 616294080.

The previous prime is 1155551399. The next prime is 1155551461. The reversal of 1155551415 is 5141555511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155551415 - 2⁴ = 1155551399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38518366 + ... + 38518395.

It is an arithmetic number, because the mean of its divisors is an integer number (231110286).

Almost surely, 2^1155551415 is an apocalyptic number.

1155551415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155551415 is a deficient number, since it is larger than the sum of its proper divisors (693330873).

1155551415 is an equidigital number, since it uses as much as digits as its factorization.

1155551415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77036769.

The product of its digits is 12500, while the sum is 33.

The square root of 1155551415 is about 33993.4025216659. The cubic root of 1155551415 is about 1049.3726910566.

The spelling of 1155551415 in words is "one billion, one hundred fifty-five million, five hundred fifty-one thousand, four hundred fifteen".