6216149640 has 32 divisors (see below), whose sum is σ = 18648449280. Its totient is φ = 1657639872.

The previous prime is 6216149609. The next prime is 6216149657. The reversal of 6216149640 is 469416126.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25900504 + ... + 25900743.

It is an arithmetic number, because the mean of its divisors is an integer number (582764040).

Almost surely, 2^6216149640 is an apocalyptic number.

6216149640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6216149640 is an abundant number, since it is smaller than the sum of its proper divisors (12432299640).

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

6216149640 is a wasteful number, since it uses less digits than its factorization.

6216149640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51801261 (or 51801257 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 6216149640 is about 78842.5623632312. The cubic root of 6216149640 is about 1838.6842397128.

The spelling of 6216149640 in words is "six billion, two hundred sixteen million, one hundred forty-nine thousand, six hundred forty".