26257657140 has 192 divisors, whose sum is σ = 95972325120. Its totient is φ = 5875822080.

The previous prime is 26257657121. The next prime is 26257657171. The reversal of 26257657140 is 4175675262.

26257657140 is a `hidden beast` number, since 2 + 6 + 2 + 5 + 76 + 571 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 92799 + ... + 247238.

It is an arithmetic number, because the mean of its divisors is an integer number (499855860).

Almost surely, 2^26257657140 is an apocalyptic number.

26257657140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26257657140 is an abundant number, since it is smaller than the sum of its proper divisors (69714667980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26257657140 is a wasteful number, since it uses less digits than its factorization.

26257657140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340079 (or 340071 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 26257657140 in words is "twenty-six billion, two hundred fifty-seven million, six hundred fifty-seven thousand, one hundred forty".