7877349681 has 8 divisors (see below), whose sum is σ = 10541890944. Its totient is φ = 5232187440.

The previous prime is 7877349679. The next prime is 7877349743. The reversal of 7877349681 is 1869437787.

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

It is not a de Polignac number, because 7877349681 - 2¹ = 7877349679 is a prime.

It is a super-2 number, since 2×7877349681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7877349881) 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, 4843806 + ... + 4845431.

It is an arithmetic number, because the mean of its divisors is an integer number (1317736368).

Almost surely, 2^7877349681 is an apocalyptic number.

It is an amenable number.

7877349681 is a deficient number, since it is larger than the sum of its proper divisors (2664541263).

7877349681 is a wasteful number, since it uses less digits than its factorization.

7877349681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9689511.

The product of its digits is 14224896, while the sum is 60.

The square root of 7877349681 is about 88754.4347117371. The cubic root of 7877349681 is about 1989.7264576073.

The spelling of 7877349681 in words is "seven billion, eight hundred seventy-seven million, three hundred forty-nine thousand, six hundred eighty-one".