1090820720155 has 16 divisors (see below), whose sum is σ = 1386009912960. Its totient is φ = 821308465152.

The previous prime is 1090820720141. The next prime is 1090820720161. The reversal of 1090820720155 is 5510270280901.

It is not a de Polignac number, because 1090820720155 - 2⁵ = 1090820720123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6740347 + ... + 6900283.

It is an arithmetic number, because the mean of its divisors is an integer number (86625619560).

Almost surely, 2^{1090820720155} is an apocalyptic number.

1090820720155 is a deficient number, since it is larger than the sum of its proper divisors (295189192805).

1090820720155 is a wasteful number, since it uses less digits than its factorization.

1090820720155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240198.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 1090820720155 in words is "one trillion, ninety billion, eight hundred twenty million, seven hundred twenty thousand, one hundred fifty-five".