1161061551 has 48 divisors (see below), whose sum is σ = 1896900096. Its totient is φ = 678984768.

The previous prime is 1161061543. The next prime is 1161061607. The reversal of 1161061551 is 1551601611.

1161061551 is a `hidden beast` number, since 1 + 1 + 6 + 106 + 1 + 551 = 666.

It is not a de Polignac number, because 1161061551 - 2³ = 1161061543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161061501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 437310 + ... + 439956.

It is an arithmetic number, because the mean of its divisors is an integer number (39518752).

Almost surely, 2^1161061551 is an apocalyptic number.

1161061551 is a deficient number, since it is larger than the sum of its proper divisors (735838545).

1161061551 is a wasteful number, since it uses less digits than its factorization.

1161061551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852 (or 2849 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1161061551 is about 34074.3532733932. The cubic root of 1161061551 is about 1051.0379912291.

The spelling of 1161061551 in words is "one billion, one hundred sixty-one million, sixty-one thousand, five hundred fifty-one".