1097155678 has 8 divisors (see below), whose sum is σ = 1648166472. Its totient is φ = 547766856.

The previous prime is 1097155603. The next prime is 1097155693. The reversal of 1097155678 is 8765517901.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 403800 + ... + 406507.

It is an arithmetic number, because the mean of its divisors is an integer number (206020809).

Almost surely, 2^1097155678 is an apocalyptic number.

1097155678 is a deficient number, since it is larger than the sum of its proper divisors (551010794).

1097155678 is an equidigital number, since it uses as much as digits as its factorization.

1097155678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810986.

The product of its (nonzero) digits is 529200, while the sum is 49.

The square root of 1097155678 is about 33123.3403810666. The cubic root of 1097155678 is about 1031.3896089754.

The spelling of 1097155678 in words is "one billion, ninety-seven million, one hundred fifty-five thousand, six hundred seventy-eight".