26505500190 has 256 divisors, whose sum is σ = 75058679808. Its totient is φ = 5929721856.

The previous prime is 26505500143. The next prime is 26505500209. The reversal of 26505500190 is 9100550562.

It is a super-2 number, since 2×26505500190² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40966447 + ... + 40967093.

It is an arithmetic number, because the mean of its divisors is an integer number (293197968).

Almost surely, 2^26505500190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26505500190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37529339904).

26505500190 is an abundant number, since it is smaller than the sum of its proper divisors (48553179618).

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

26505500190 is a wasteful number, since it uses less digits than its factorization.

26505500190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891.

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 26505500190 in words is "twenty-six billion, five hundred five million, five hundred thousand, one hundred ninety".