26195400781 has 16 divisors (see below), whose sum is σ = 29261073600. Its totient is φ = 23244520320.

The previous prime is 26195400779. The next prime is 26195400839. The reversal of 26195400781 is 18700459162.

It is not a de Polignac number, because 26195400781 - 2¹ = 26195400779 is a prime.

It is a super-2 number, since 2×26195400781² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26195400731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714801 + ... + 750553.

It is an arithmetic number, because the mean of its divisors is an integer number (1828817100).

Almost surely, 2^26195400781 is an apocalyptic number.

It is an amenable number.

26195400781 is a deficient number, since it is larger than the sum of its proper divisors (3065672819).

26195400781 is a wasteful number, since it uses less digits than its factorization.

26195400781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37356.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 26195400781 in words is "twenty-six billion, one hundred ninety-five million, four hundred thousand, seven hundred eighty-one".