266015140554431 has 4 divisors (see below), whose sum is σ = 273204738947832. Its totient is φ = 258825542161032.

The previous prime is 266015140554407. The next prime is 266015140554487. The reversal of 266015140554431 is 134455041510662.

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 266015140554431 - 2³⁸ = 265740262647487 is a prime.

It is a super-2 number, since 2×266015140554431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266015140554131) 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, 3594799196645 + ... + 3594799196718.

It is an arithmetic number, because the mean of its divisors is an integer number (68301184736958).

Almost surely, 2^{266015140554431} is an apocalyptic number.

266015140554431 is a deficient number, since it is larger than the sum of its proper divisors (7189598393401).

266015140554431 is an equidigital number, since it uses as much as digits as its factorization.

266015140554431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189598393400.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 266015140554431 in words is "two hundred sixty-six trillion, fifteen billion, one hundred forty million, five hundred fifty-four thousand, four hundred thirty-one".