1161037478 has 4 divisors (see below), whose sum is σ = 1741556220. Its totient is φ = 580518738.

The previous prime is 1161037477. The next prime is 1161037487. The reversal of 1161037478 is 8747301611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161037477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290259368 + ... + 290259371.

It is an arithmetic number, because the mean of its divisors is an integer number (435389055).

Almost surely, 2^1161037478 is an apocalyptic number.

1161037478 is a deficient number, since it is larger than the sum of its proper divisors (580518742).

1161037478 is an equidigital number, since it uses as much as digits as its factorization.

1161037478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580518741.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 1161037478 is about 34074.0000293479. Note that the first 4 decimals coincide. The cubic root of 1161037478 is about 1051.0307272409.

The spelling of 1161037478 in words is "one billion, one hundred sixty-one million, thirty-seven thousand, four hundred seventy-eight".