26155549728 has 576 divisors, whose sum is σ = 97040885760. Its totient is φ = 6708303360.

The previous prime is 26155549723. The next prime is 26155549729. The reversal of 26155549728 is 82794555162.

26155549728 is a `hidden beast` number, since 2 + 6 + 15 + 554 + 9 + 72 + 8 = 666.

It is a super-2 number, since 2×26155549728² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26155549723) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 75376051 + ... + 75376397.

It is an arithmetic number, because the mean of its divisors is an integer number (168473760).

Almost surely, 2^26155549728 is an apocalyptic number.

26155549728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26155549728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48520442880).

26155549728 is an abundant number, since it is smaller than the sum of its proper divisors (70885336032).

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

26155549728 is a wasteful number, since it uses less digits than its factorization.

26155549728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 473 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 54.

The spelling of 26155549728 in words is "twenty-six billion, one hundred fifty-five million, five hundred forty-nine thousand, seven hundred twenty-eight".