26400732730 has 16 divisors (see below), whose sum is σ = 47545440264. Its totient is φ = 10554932800.

The previous prime is 26400732691. The next prime is 26400732779. The reversal of 26400732730 is 3723700462.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21329726209 + 5071006521 = 146047^2 + 71211^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649321 + ... + 688780.

Almost surely, 2^26400732730 is an apocalyptic number.

26400732730 is a deficient number, since it is larger than the sum of its proper divisors (21144707534).

26400732730 is a wasteful number, since it uses less digits than its factorization.

26400732730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340081.

The product of its (nonzero) digits is 42336, while the sum is 34.

The spelling of 26400732730 in words is "twenty-six billion, four hundred million, seven hundred thirty-two thousand, seven hundred thirty".