1216790455 has 8 divisors (see below), whose sum is σ = 1507250304. Its totient is φ = 942031200.

The previous prime is 1216790437. The next prime is 1216790501. The reversal of 1216790455 is 5540976121.

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

It is not a de Polignac number, because 1216790455 - 2⁵ = 1216790423 is a prime.

It is a super-3 number, since 3×1216790455³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3924976 + ... + 3925285.

It is an arithmetic number, because the mean of its divisors is an integer number (188406288).

Almost surely, 2^1216790455 is an apocalyptic number.

1216790455 is a deficient number, since it is larger than the sum of its proper divisors (290459849).

1216790455 is an equidigital number, since it uses as much as digits as its factorization.

1216790455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850297.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 1216790455 is about 34882.5236329025. The cubic root of 1216790455 is about 1067.5918869618.

The spelling of 1216790455 in words is "one billion, two hundred sixteen million, seven hundred ninety thousand, four hundred fifty-five".