1146161551 has 4 divisors (see below), whose sum is σ = 1146298392. Its totient is φ = 1146024712.

The previous prime is 1146161521. The next prime is 1146161561. The reversal of 1146161551 is 1551616411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1146161551 - 2⁹ = 1146161039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1146161501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54976 + ... + 72901.

It is an arithmetic number, because the mean of its divisors is an integer number (286574598).

Almost surely, 2^1146161551 is an apocalyptic number.

1146161551 is a deficient number, since it is larger than the sum of its proper divisors (136841).

1146161551 is an equidigital number, since it uses as much as digits as its factorization.

1146161551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136840.

The product of its digits is 3600, while the sum is 31.

The square root of 1146161551 is about 33855.0077684233. The cubic root of 1146161551 is about 1046.5226008433.

Adding to 1146161551 its reverse (1551616411), we get a palindrome (2697777962).

The spelling of 1146161551 in words is "one billion, one hundred forty-six million, one hundred sixty-one thousand, five hundred fifty-one".