7801440681 has 8 divisors (see below), whose sum is σ = 10655626464. Its totient is φ = 5074107680.

The previous prime is 7801440677. The next prime is 7801440701. The reversal of 7801440681 is 1860441087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7801440681 - 2² = 7801440677 is a prime.

It is a super-2 number, since 2×7801440681² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7801440601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31713051 + ... + 31713296.

It is an arithmetic number, because the mean of its divisors is an integer number (1331953308).

Almost surely, 2^7801440681 is an apocalyptic number.

It is an amenable number.

7801440681 is a deficient number, since it is larger than the sum of its proper divisors (2854185783).

7801440681 is a wasteful number, since it uses less digits than its factorization.

7801440681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63426391.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 7801440681 is about 88325.7645367421. The cubic root of 7801440681 is about 1983.3145754944.

The spelling of 7801440681 in words is "seven billion, eight hundred one million, four hundred forty thousand, six hundred eighty-one".