7940280851 has 2 divisors, whose sum is σ = 7940280852. Its totient is φ = 7940280850.

The previous prime is 7940280847. The next prime is 7940280857. The reversal of 7940280851 is 1580820497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7940280851 - 2² = 7940280847 is a prime.

It is not a weakly prime, because it can be changed into another prime (7940280857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970140425 + 3970140426.

It is an arithmetic number, because the mean of its divisors is an integer number (3970140426).

Almost surely, 2^7940280851 is an apocalyptic number.

7940280851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940280851 is an equidigital number, since it uses as much as digits as its factorization.

7940280851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 7940280851 is about 89108.2535515089. The cubic root of 7940280851 is about 1995.0109693850.

The spelling of 7940280851 in words is "seven billion, nine hundred forty million, two hundred eighty thousand, eight hundred fifty-one".