7040377681 has 4 divisors (see below), whose sum is σ = 7040578212. Its totient is φ = 7040177152.

The previous prime is 7040377657. The next prime is 7040377691. The reversal of 7040377681 is 1867730407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1867730407 = 251 ⋅7441157.

It can be written as a sum of positive squares in 2 ways, for example, as 4792100625 + 2248277056 = 69225^2 + 47416^2 .

It is a cyclic number.

It is not a de Polignac number, because 7040377681 - 2²⁹ = 6503506769 is a prime.

It is a super-2 number, since 2×7040377681² = 99133835782245875522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7040377691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32200 + ... + 122953.

It is an arithmetic number, because the mean of its divisors is an integer number (1760144553).

Almost surely, 2^7040377681 is an apocalyptic number.

It is an amenable number.

7040377681 is a deficient number, since it is larger than the sum of its proper divisors (200531).

7040377681 is a wasteful number, since it uses less digits than its factorization.

7040377681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200530.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 7040377681 is about 83906.9584778283. The cubic root of 7040377681 is about 1916.6022154744.

The spelling of 7040377681 in words is "seven billion, forty million, three hundred seventy-seven thousand, six hundred eighty-one".