25401266540026 has 32 divisors (see below), whose sum is σ = 42675250947840. Its totient is φ = 11262415784256.

The previous prime is 25401266540017. The next prime is 25401266540033. The reversal of 25401266540026 is 62004566210452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167041996 + ... + 167193991.

It is an arithmetic number, because the mean of its divisors is an integer number (1333601592120).

Almost surely, 2^{25401266540026} is an apocalyptic number.

25401266540026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25401266540026 is a deficient number, since it is larger than the sum of its proper divisors (17273984407814).

25401266540026 is a wasteful number, since it uses less digits than its factorization.

25401266540026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334236118.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 25401266540026 in words is "twenty-five trillion, four hundred one billion, two hundred sixty-six million, five hundred forty thousand, twenty-six".