1861158560 has 48 divisors (see below), whose sum is σ = 4400858952. Its totient is φ = 743808000.

The previous prime is 1861158557. The next prime is 1861158569. The reversal of 1861158560 is 658511681.

It can be written as a sum of positive squares in 4 ways, for example, as 985708816 + 875449744 = 31396^2 + 29588^2 .

It is a super-2 number, since 2×1861158560² = 6927822370922547200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1861158569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203690 + ... + 212630.

Almost surely, 2^1861158560 is an apocalyptic number.

1861158560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1861158560 is an abundant number, since it is smaller than the sum of its proper divisors (2539700392).

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

1861158560 is a wasteful number, since it uses less digits than its factorization.

1861158560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257 (or 10249 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 1861158560 is about 43141.1469481283. The cubic root of 1861158560 is about 1230.0642353040.

The spelling of 1861158560 in words is "one billion, eight hundred sixty-one million, one hundred fifty-eight thousand, five hundred sixty".