1161625255 has 16 divisors (see below), whose sum is σ = 1612283904. Its totient is φ = 786944160.

The previous prime is 1161625253. The next prime is 1161625271. The reversal of 1161625255 is 5525261611.

It is not a de Polignac number, because 1161625255 - 2¹ = 1161625253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1161625255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161625253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197031 + ... + 202840.

It is an arithmetic number, because the mean of its divisors is an integer number (100767744).

Almost surely, 2^1161625255 is an apocalyptic number.

1161625255 is a deficient number, since it is larger than the sum of its proper divisors (450658649).

1161625255 is an equidigital number, since it uses as much as digits as its factorization.

1161625255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399966.

The product of its digits is 18000, while the sum is 34.

The square root of 1161625255 is about 34082.6239453479. The cubic root of 1161625255 is about 1051.2080592907.

Adding to 1161625255 its reverse (5525261611), we get a palindrome (6686886866).

The spelling of 1161625255 in words is "one billion, one hundred sixty-one million, six hundred twenty-five thousand, two hundred fifty-five".