1163561525 has 24 divisors (see below), whose sum is σ = 1667482560. Its totient is φ = 788895360.

The previous prime is 1163561507. The next prime is 1163561551. The reversal of 1163561525 is 5251653611.

It is not a de Polignac number, because 1163561525 - 2²⁶ = 1096452661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21779 + ... + 52928.

It is an arithmetic number, because the mean of its divisors is an integer number (69478440).

Almost surely, 2^1163561525 is an apocalyptic number.

It is an amenable number.

1163561525 is a deficient number, since it is larger than the sum of its proper divisors (503921035).

1163561525 is an equidigital number, since it uses as much as digits as its factorization.

1163561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74813 (or 74808 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 1163561525 is about 34111.0176482614. The cubic root of 1163561525 is about 1051.7918082932.

The spelling of 1163561525 in words is "one billion, one hundred sixty-three million, five hundred sixty-one thousand, five hundred twenty-five".