276403912640 has 112 divisors (see below), whose sum is σ = 662443541760. Its totient is φ = 109847715840.

The previous prime is 276403912633. The next prime is 276403912643. The reversal of 276403912640 is 46219304672.

276403912640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 276403912591 and 276403912600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276403912643) 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, 101879924 + ... + 101882636.

It is an arithmetic number, because the mean of its divisors is an integer number (5914674480).

Almost surely, 2^276403912640 is an apocalyptic number.

276403912640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276403912640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331221770880).

276403912640 is an abundant number, since it is smaller than the sum of its proper divisors (386039629120).

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

276403912640 is a wasteful number, since it uses less digits than its factorization.

276403912640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4660 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 276403912640 in words is "two hundred seventy-six billion, four hundred three million, nine hundred twelve thousand, six hundred forty".