2631964778 has 8 divisors (see below), whose sum is σ = 4155733920. Its totient is φ = 1246720140.

The previous prime is 2631964763. The next prime is 2631964781. The reversal of 2631964778 is 8774691362.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34631078 + ... + 34631153.

It is an arithmetic number, because the mean of its divisors is an integer number (519466740).

Almost surely, 2^2631964778 is an apocalyptic number.

2631964778 is a deficient number, since it is larger than the sum of its proper divisors (1523769142).

2631964778 is a wasteful number, since it uses less digits than its factorization.

2631964778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69262252.

The product of its digits is 3048192, while the sum is 53.

The square root of 2631964778 is about 51302.6780782446. The cubic root of 2631964778 is about 1380.6810294664.

The spelling of 2631964778 in words is "two billion, six hundred thirty-one million, nine hundred sixty-four thousand, seven hundred seventy-eight".