26290367550 has 144 divisors (see below), whose sum is σ = 72128843280. Its totient is φ = 6863339520.

The previous prime is 26290367531. The next prime is 26290367627. The reversal of 26290367550 is 5576309262.

26290367550 is a `hidden beast` number, since 2 + 6 + 2 + 90 + 3 + 6 + 7 + 550 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 26290367496 and 26290367505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6821424 + ... + 6825276.

It is an arithmetic number, because the mean of its divisors is an integer number (500894745).

Almost surely, 2^26290367550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26290367550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36064421640).

26290367550 is an abundant number, since it is smaller than the sum of its proper divisors (45838475730).

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

26290367550 is a wasteful number, since it uses less digits than its factorization.

26290367550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187 (or 4179 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The spelling of 26290367550 in words is "twenty-six billion, two hundred ninety million, three hundred sixty-seven thousand, five hundred fifty".