26778750516 has 72 divisors (see below), whose sum is σ = 77398985664. Its totient is φ = 7647298560.

The previous prime is 26778750511. The next prime is 26778750517. The reversal of 26778750516 is 61505787762.

It is a happy number.

26778750516 is a `hidden beast` number, since 2 + 6 + 7 + 78 + 7 + 50 + 516 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26778750511) 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, 507331 + ... + 557621.

It is an arithmetic number, because the mean of its divisors is an integer number (1074985912).

Almost surely, 2^26778750516 is an apocalyptic number.

It is an amenable number.

26778750516 is an abundant number, since it is smaller than the sum of its proper divisors (50620235148).

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

26778750516 is a wasteful number, since it uses less digits than its factorization.

26778750516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52421 (or 52416 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 54.

The spelling of 26778750516 in words is "twenty-six billion, seven hundred seventy-eight million, seven hundred fifty thousand, five hundred sixteen".