7640237906 has 32 divisors (see below), whose sum is σ = 13444824960. Its totient is φ = 3187900800.

The previous prime is 7640237887. The next prime is 7640237939. The reversal of 7640237906 is 6097320467.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268280 + ... + 295388.

It is an arithmetic number, because the mean of its divisors is an integer number (420150780).

Almost surely, 2^7640237906 is an apocalyptic number.

7640237906 is a deficient number, since it is larger than the sum of its proper divisors (5804587054).

7640237906 is a wasteful number, since it uses less digits than its factorization.

7640237906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27650.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 7640237906 is about 87408.4544309073. The cubic root of 7640237906 is about 1969.5588442450.

The spelling of 7640237906 in words is "seven billion, six hundred forty million, two hundred thirty-seven thousand, nine hundred six".