1263918046 has 4 divisors (see below), whose sum is σ = 1895877072. Its totient is φ = 631959022.

The previous prime is 1263918041. The next prime is 1263918059. The reversal of 1263918046 is 6408193621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6408193621 = 277 ⋅23134273.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263918041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315979510 + ... + 315979513.

It is an arithmetic number, because the mean of its divisors is an integer number (473969268).

Almost surely, 2^1263918046 is an apocalyptic number.

1263918046 is a deficient number, since it is larger than the sum of its proper divisors (631959026).

1263918046 is an equidigital number, since it uses as much as digits as its factorization.

1263918046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631959025.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1263918046 is about 35551.6250824066. The cubic root of 1263918046 is about 1081.2006668616.

The spelling of 1263918046 in words is "one billion, two hundred sixty-three million, nine hundred eighteen thousand, forty-six".