26468421520 has 20 divisors (see below), whose sum is σ = 61539080220. Its totient is φ = 10587368576.

The previous prime is 26468421461. The next prime is 26468421521. The reversal of 26468421520 is 2512486462.

It can be written as a sum of positive squares in 2 ways, for example, as 8267173776 + 18201247744 = 90924^2 + 134912^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×26468421520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (26468421521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165427555 + ... + 165427714.

It is an arithmetic number, because the mean of its divisors is an integer number (3076954011).

Almost surely, 2^26468421520 is an apocalyptic number.

26468421520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26468421520 is an abundant number, since it is smaller than the sum of its proper divisors (35070658700).

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

26468421520 is a wasteful number, since it uses less digits than its factorization.

26468421520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330855282 (or 330855276 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 26468421520 in words is "twenty-six billion, four hundred sixty-eight million, four hundred twenty-one thousand, five hundred twenty".