6939645426 has 24 divisors (see below), whose sum is σ = 17183884224. Its totient is φ = 1982755800.

The previous prime is 6939645409. The next prime is 6939645437. The reversal of 6939645426 is 6245469396.

6939645426 is a `hidden beast` number, since 6 + 9 + 3 + 96 + 4 + 542 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27538150 + ... + 27538401.

It is an arithmetic number, because the mean of its divisors is an integer number (715995176).

Almost surely, 2^6939645426 is an apocalyptic number.

6939645426 is an abundant number, since it is smaller than the sum of its proper divisors (10244238798).

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

6939645426 is a wasteful number, since it uses less digits than its factorization.

6939645426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55076566 (or 55076563 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The square root of 6939645426 is about 83304.5342463422. The cubic root of 6939645426 is about 1907.4174892667.

The spelling of 6939645426 in words is "six billion, nine hundred thirty-nine million, six hundred forty-five thousand, four hundred twenty-six".