26128691340 has 48 divisors (see below), whose sum is σ = 73280965632. Its totient is φ = 6956162496.

The previous prime is 26128691317. The next prime is 26128691363. The reversal of 26128691340 is 4319682162.

It is an interprime number because it is at equal distance from previous prime (26128691317) and next prime (26128691363).

It is a super-2 number, since 2×26128691340² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26128691292 and 26128691301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322294 + ... + 395133.

It is an arithmetic number, because the mean of its divisors is an integer number (1526686784).

Almost surely, 2^26128691340 is an apocalyptic number.

26128691340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26128691340 is an abundant number, since it is smaller than the sum of its proper divisors (47152274292).

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

26128691340 is a wasteful number, since it uses less digits than its factorization.

26128691340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718046 (or 718044 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 26128691340 in words is "twenty-six billion, one hundred twenty-eight million, six hundred ninety-one thousand, three hundred forty".