1156161551 has 16 divisors (see below), whose sum is σ = 1237975200. Its totient is φ = 1079685504.

The previous prime is 1156161547. The next prime is 1156161553. The reversal of 1156161551 is 1551616511.

It is not a de Polignac number, because 1156161551 - 2² = 1156161547 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 (1156161553) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 682061 + ... + 683753.

It is an arithmetic number, because the mean of its divisors is an integer number (77373450).

Almost surely, 2^1156161551 is an apocalyptic number.

1156161551 is a deficient number, since it is larger than the sum of its proper divisors (81813649).

1156161551 is an equidigital number, since it uses as much as digits as its factorization.

1156161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1849 counting only the distinct ones).

The product of its digits is 4500, while the sum is 32.

The square root of 1156161551 is about 34002.3756670030. The cubic root of 1156161551 is about 1049.5573496229.

The spelling of 1156161551 in words is "one billion, one hundred fifty-six million, one hundred sixty-one thousand, five hundred fifty-one".