26215301551 has 4 divisors (see below), whose sum is σ = 26382278152. Its totient is φ = 26048324952.

The previous prime is 26215301549. The next prime is 26215301557. The reversal of 26215301551 is 15510351262.

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

It is a cyclic number.

It is not a de Polignac number, because 26215301551 - 2¹ = 26215301549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26215301557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83488065 + ... + 83488378.

It is an arithmetic number, because the mean of its divisors is an integer number (6595569538).

Almost surely, 2^26215301551 is an apocalyptic number.

26215301551 is a deficient number, since it is larger than the sum of its proper divisors (166976601).

26215301551 is a wasteful number, since it uses less digits than its factorization.

26215301551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166976600.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 26215301551 in words is "twenty-six billion, two hundred fifteen million, three hundred one thousand, five hundred fifty-one".