6211497640 has 32 divisors (see below), whose sum is σ = 14184470880. Its totient is φ = 2447514432.

The previous prime is 6211497637. The next prime is 6211497647. The reversal of 6211497640 is 467941126.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6211497593 and 6211497602.

It is not an unprimeable number, because it can be changed into a prime (6211497647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156182 + ... + 1161541.

It is an arithmetic number, because the mean of its divisors is an integer number (443264715).

Almost surely, 2^6211497640 is an apocalyptic number.

It is an amenable number.

6211497640 is an abundant number, since it is smaller than the sum of its proper divisors (7972973240).

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

6211497640 is a wasteful number, since it uses less digits than its factorization.

6211497640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317801 (or 2317797 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6211497640 is about 78813.0550099411. The cubic root of 6211497640 is about 1838.2254512227.

The spelling of 6211497640 in words is "six billion, two hundred eleven million, four hundred ninety-seven thousand, six hundred forty".