26405352642 has 16 divisors (see below), whose sum is σ = 52823932992. Its totient is φ = 8799579600.

The previous prime is 26405352601. The next prime is 26405352643. The reversal of 26405352642 is 24625350462.

It is a self number, because there is not a number n which added to its sum of digits gives 26405352642.

It is not an unprimeable number, because it can be changed into a prime (26405352643) 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, 525109 + ... + 573192.

It is an arithmetic number, because the mean of its divisors is an integer number (3301495812).

Almost surely, 2^26405352642 is an apocalyptic number.

26405352642 is an abundant number, since it is smaller than the sum of its proper divisors (26418580350).

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

26405352642 is a wasteful number, since it uses less digits than its factorization.

26405352642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102313.

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 26405352642 in words is "twenty-six billion, four hundred five million, three hundred fifty-two thousand, six hundred forty-two".