1278375963 has 16 divisors (see below), whose sum is σ = 1738951200. Its totient is φ = 835130880.

The previous prime is 1278375961. The next prime is 1278375971. The reversal of 1278375963 is 3695738721.

It is not a de Polignac number, because 1278375963 - 2¹ = 1278375961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1278375961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36243 + ... + 62211.

It is an arithmetic number, because the mean of its divisors is an integer number (108684450).

Almost surely, 2^1278375963 is an apocalyptic number.

1278375963 is a deficient number, since it is larger than the sum of its proper divisors (460575237).

1278375963 is a wasteful number, since it uses less digits than its factorization.

1278375963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26302.

The product of its digits is 1905120, while the sum is 51.

The square root of 1278375963 is about 35754.3838291195. The cubic root of 1278375963 is about 1085.3076528515.

The spelling of 1278375963 in words is "one billion, two hundred seventy-eight million, three hundred seventy-five thousand, nine hundred sixty-three".