26490719520 has 120 divisors (see below), whose sum is σ = 93490210044. Its totient is φ = 7064188416.

The previous prime is 26490719483. The next prime is 26490719527. The reversal of 26490719520 is 2591709462.

26490719520 is a `hidden beast` number, since 2 + 6 + 490 + 71 + 95 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23508248976 + 2982470544 = 153324^2 + 54612^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (26490719527) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1009059 + ... + 1034978.

Almost surely, 2^26490719520 is an apocalyptic number.

26490719520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26490719520 is an abundant number, since it is smaller than the sum of its proper divisors (66999490524).

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

26490719520 is a wasteful number, since it uses less digits than its factorization.

26490719520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044064 (or 2044047 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 26490719520 in words is "twenty-six billion, four hundred ninety million, seven hundred nineteen thousand, five hundred twenty".