6926345640 has 224 divisors, whose sum is σ = 23517906120. Its totient is φ = 1835011584.

The previous prime is 6926345639. The next prime is 6926345653. The reversal of 6926345640 is 465436296.

6926345640 is a `hidden beast` number, since 6 + 9 + 2 + 634 + 5 + 6 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6834990276 + 91355364 = 82674^2 + 9558^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 5043994 + ... + 5045366.

Almost surely, 2^6926345640 is an apocalyptic number.

6926345640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6926345640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11758953060).

6926345640 is an abundant number, since it is smaller than the sum of its proper divisors (16591560480).

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

6926345640 is a wasteful number, since it uses less digits than its factorization.

6926345640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The square root of 6926345640 is about 83224.6696599031. The cubic root of 6926345640 is about 1906.1981922102.

The spelling of 6926345640 in words is "six billion, nine hundred twenty-six million, three hundred forty-five thousand, six hundred forty".