26347561506 has 48 divisors (see below), whose sum is σ = 66472570944. Its totient is φ = 7385837472.

The previous prime is 26347561489. The next prime is 26347561507. The reversal of 26347561506 is 60516574362.

26347561506 is a `hidden beast` number, since 2 + 6 + 34 + 7 + 561 + 50 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (26347561507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1966036 + ... + 1979391.

It is an arithmetic number, because the mean of its divisors is an integer number (1384845228).

Almost surely, 2^26347561506 is an apocalyptic number.

26347561506 is an abundant number, since it is smaller than the sum of its proper divisors (40125009438).

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

26347561506 is a wasteful number, since it uses less digits than its factorization.

26347561506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945495 (or 3945492 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 26347561506 in words is "twenty-six billion, three hundred forty-seven million, five hundred sixty-one thousand, five hundred six".