26390657834 has 16 divisors (see below), whose sum is σ = 40210496928. Its totient is φ = 12988730352.

The previous prime is 26390657831. The next prime is 26390657849. The reversal of 26390657834 is 43875609362.

It is a happy number.

It is a super-2 number, since 2×26390657834² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26390657831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359144 + ... + 426339.

It is an arithmetic number, because the mean of its divisors is an integer number (2513156058).

Almost surely, 2^26390657834 is an apocalyptic number.

26390657834 is a deficient number, since it is larger than the sum of its proper divisors (13819839094).

26390657834 is a wasteful number, since it uses less digits than its factorization.

26390657834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785749.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 26390657834 in words is "twenty-six billion, three hundred ninety million, six hundred fifty-seven thousand, eight hundred thirty-four".