1161904536 has 48 divisors (see below), whose sum is σ = 3388890960. Its totient is φ = 357508800.

The previous prime is 1161904493. The next prime is 1161904537. The reversal of 1161904536 is 6354091611.

1161904536 is a `hidden beast` number, since 1 + 1 + 619 + 0 + 4 + 5 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1161904536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161904537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 619740 + ... + 621611.

It is an arithmetic number, because the mean of its divisors is an integer number (70601895).

Almost surely, 2^1161904536 is an apocalyptic number.

It is an amenable number.

1161904536 is an abundant number, since it is smaller than the sum of its proper divisors (2226986424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161904536 is a wasteful number, since it uses less digits than its factorization.

1161904536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241376 (or 1241369 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1161904536 is about 34086.7208161771. The cubic root of 1161904536 is about 1051.2922972760.

The spelling of 1161904536 in words is "one billion, one hundred sixty-one million, nine hundred four thousand, five hundred thirty-six".