26391953542 has 4 divisors (see below), whose sum is σ = 39587930316. Its totient is φ = 13195976770.

The previous prime is 26391953521. The next prime is 26391953551. The reversal of 26391953542 is 24535919362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6597988384 + ... + 6597988387.

It is an arithmetic number, because the mean of its divisors is an integer number (9896982579).

Almost surely, 2^26391953542 is an apocalyptic number.

26391953542 is a deficient number, since it is larger than the sum of its proper divisors (13195976774).

26391953542 is a wasteful number, since it uses less digits than its factorization.

26391953542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13195976773.

The product of its digits is 1749600, while the sum is 49.

The spelling of 26391953542 in words is "twenty-six billion, three hundred ninety-one million, nine hundred fifty-three thousand, five hundred forty-two".