3620918857 has 2 divisors, whose sum is σ = 3620918858. Its totient is φ = 3620918856.

The previous prime is 3620918843. The next prime is 3620918867. The reversal of 3620918857 is 7588190263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2480438416 + 1140480441 = 49804^2 + 33771^2 .

It is a cyclic number.

It is not a de Polignac number, because 3620918857 - 2⁷ = 3620918729 is a prime.

It is a super-2 number, since 2×3620918857² = 26222106737956372898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3620918857.

It is not a weakly prime, because it can be changed into another prime (3620918867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810459428 + 1810459429.

It is an arithmetic number, because the mean of its divisors is an integer number (1810459429).

Almost surely, 2^3620918857 is an apocalyptic number.

It is an amenable number.

3620918857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3620918857 is an equidigital number, since it uses as much as digits as its factorization.

3620918857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 3620918857 is about 60174.0713015166. The cubic root of 3620918857 is about 1535.5817106501.

The spelling of 3620918857 in words is "three billion, six hundred twenty million, nine hundred eighteen thousand, eight hundred fifty-seven".