1123780551 has 8 divisors (see below), whose sum is σ = 1498539504. Its totient is φ = 749104320.

The previous prime is 1123780549. The next prime is 1123780589. The reversal of 1123780551 is 1550873211.

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

It is not a de Polignac number, because 1123780551 - 2¹ = 1123780549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123780501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26211 + ... + 54171.

It is an arithmetic number, because the mean of its divisors is an integer number (187317438).

Almost surely, 2^1123780551 is an apocalyptic number.

1123780551 is a deficient number, since it is larger than the sum of its proper divisors (374758953).

1123780551 is a wasteful number, since it uses less digits than its factorization.

1123780551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41361.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 1123780551 is about 33522.8362612712. The cubic root of 1123780551 is about 1039.6659895713.

The spelling of 1123780551 in words is "one billion, one hundred twenty-three million, seven hundred eighty thousand, five hundred fifty-one".