26267720425 has 12 divisors (see below), whose sum is σ = 34487972316. Its totient is φ = 19778048000.

The previous prime is 26267720407. The next prime is 26267720431. The reversal of 26267720425 is 52402776262.

It can be written as a sum of positive squares in 6 ways, for example, as 1153077849 + 25114642576 = 33957^2 + 158476^2 .

It is not a de Polignac number, because 26267720425 - 2¹¹ = 26267718377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30902776 + ... + 30903625.

It is an arithmetic number, because the mean of its divisors is an integer number (2873997693).

Almost surely, 2^26267720425 is an apocalyptic number.

26267720425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26267720425 is a deficient number, since it is larger than the sum of its proper divisors (8220251891).

26267720425 is a wasteful number, since it uses less digits than its factorization.

26267720425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61806428 (or 61806423 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 43.

The spelling of 26267720425 in words is "twenty-six billion, two hundred sixty-seven million, seven hundred twenty thousand, four hundred twenty-five".