7949785818 has 16 divisors (see below), whose sum is σ = 17122615776. Its totient is φ = 2446087920.

The previous prime is 7949785817. The next prime is 7949785819. The reversal of 7949785818 is 8185879497.

It is an interprime number because it is at equal distance from previous prime (7949785817) and next prime (7949785819).

It is not an unprimeable number, because it can be changed into a prime (7949785817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50960088 + ... + 50960243.

It is an arithmetic number, because the mean of its divisors is an integer number (1070163486).

Almost surely, 2^7949785818 is an apocalyptic number.

7949785818 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7949785818 is an abundant number, since it is smaller than the sum of its proper divisors (9172829958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7949785818 is a wasteful number, since it uses less digits than its factorization.

7949785818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101920349.

The product of its digits is 40642560, while the sum is 66.

The square root of 7949785818 is about 89161.5714195303. The cubic root of 7949785818 is about 1995.8066990916.

The spelling of 7949785818 in words is "seven billion, nine hundred forty-nine million, seven hundred eighty-five thousand, eight hundred eighteen".