26407778964 has 24 divisors (see below), whose sum is σ = 70420744128. Its totient is φ = 7545079680.

The previous prime is 26407778951. The next prime is 26407778977. The reversal of 26407778964 is 46987770462.

It is an interprime number because it is at equal distance from previous prime (26407778951) and next prime (26407778977).

It is a super-2 number, since 2×26407778964² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26407778898 and 26407778907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157189077 + ... + 157189244.

It is an arithmetic number, because the mean of its divisors is an integer number (2934197672).

Almost surely, 2^26407778964 is an apocalyptic number.

It is an amenable number.

26407778964 is an abundant number, since it is smaller than the sum of its proper divisors (44012965164).

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

26407778964 is a wasteful number, since it uses less digits than its factorization.

26407778964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314378335 (or 314378333 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 26407778964 in words is "twenty-six billion, four hundred seven million, seven hundred seventy-eight thousand, nine hundred sixty-four".