1077991563 has 8 divisors (see below), whose sum is σ = 1567987776. Its totient is φ = 653328200.

The previous prime is 1077991529. The next prime is 1077991583. The reversal of 1077991563 is 3651997701.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1077991563 - 2⁸ = 1077991307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1077991583) 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, 16333173 + ... + 16333238.

It is an arithmetic number, because the mean of its divisors is an integer number (195998472).

Almost surely, 2^1077991563 is an apocalyptic number.

1077991563 is a deficient number, since it is larger than the sum of its proper divisors (489996213).

1077991563 is a wasteful number, since it uses less digits than its factorization.

1077991563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32666425.

The product of its (nonzero) digits is 357210, while the sum is 48.

The square root of 1077991563 is about 32832.7818346238. The cubic root of 1077991563 is about 1025.3491772481.

The spelling of 1077991563 in words is "one billion, seventy-seven million, nine hundred ninety-one thousand, five hundred sixty-three".