2631288555378 has 48 divisors (see below), whose sum is σ = 6515873235456. Its totient is φ = 751761933120.

The previous prime is 2631288555317. The next prime is 2631288555397. The reversal of 2631288555378 is 8735558821362.

It is a happy number.

2631288555378 is a `hidden beast` number, since 2 + 6 + 3 + 1 + 2 + 8 + 8 + 5 + 553 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2313750 + ... + 3258222.

It is an arithmetic number, because the mean of its divisors is an integer number (135747359072).

Almost surely, 2^{2631288555378} is an apocalyptic number.

2631288555378 is an abundant number, since it is smaller than the sum of its proper divisors (3884584680078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2631288555378 is a wasteful number, since it uses less digits than its factorization.

2631288555378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966599 (or 966596 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 63.

The spelling of 2631288555378 in words is "two trillion, six hundred thirty-one billion, two hundred eighty-eight million, five hundred fifty-five thousand, three hundred seventy-eight".