7640634278 has 8 divisors (see below), whose sum is σ = 11461769568. Its totient is φ = 3820044424.

The previous prime is 7640634271. The next prime is 7640634341. The reversal of 7640634278 is 8724360467.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640634271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99326 + ... + 158577.

It is an arithmetic number, because the mean of its divisors is an integer number (1432721196).

Almost surely, 2^7640634278 is an apocalyptic number.

7640634278 is a deficient number, since it is larger than the sum of its proper divisors (3821135290).

7640634278 is a wasteful number, since it uses less digits than its factorization.

7640634278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272718.

The product of its (nonzero) digits is 1354752, while the sum is 47.

The square root of 7640634278 is about 87410.7217565443. The cubic root of 7640634278 is about 1969.5929035892.

The spelling of 7640634278 in words is "seven billion, six hundred forty million, six hundred thirty-four thousand, two hundred seventy-eight".