26618616040 has 32 divisors (see below), whose sum is σ = 59940729000. Its totient is φ = 10638763264.

The previous prime is 26618616007. The next prime is 26618616041. The reversal of 26618616040 is 4061681662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21850161124 + 4768454916 = 147818^2 + 69054^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 26618615984 and 26618616002.

It is not an unprimeable number, because it can be changed into a prime (26618616041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221575 + ... + 319894.

Almost surely, 2^26618616040 is an apocalyptic number.

26618616040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26618616040 is an abundant number, since it is smaller than the sum of its proper divisors (33322112960).

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

26618616040 is a wasteful number, since it uses less digits than its factorization.

26618616040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542709 (or 542705 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 26618616040 in words is "twenty-six billion, six hundred eighteen million, six hundred sixteen thousand, forty".