7640237887 has 2 divisors, whose sum is σ = 7640237888. Its totient is φ = 7640237886.

The previous prime is 7640237849. The next prime is 7640237939. The reversal of 7640237887 is 7887320467.

It is an a-pointer prime, because the next prime (7640237939) can be obtained adding 7640237887 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7640237887 - 2¹⁵ = 7640205119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7640237837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820118943 + 3820118944.

It is an arithmetic number, because the mean of its divisors is an integer number (3820118944).

Almost surely, 2^7640237887 is an apocalyptic number.

7640237887 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640237887 is an equidigital number, since it uses as much as digits as its factorization.

7640237887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 52.

The square root of 7640237887 is about 87408.4543222222. The cubic root of 7640237887 is about 1969.5588426123.

The spelling of 7640237887 in words is "seven billion, six hundred forty million, two hundred thirty-seven thousand, eight hundred eighty-seven".