6197131649 has 4 divisors (see below), whose sum is σ = 6251973636. Its totient is φ = 6142289664.

The previous prime is 6197131631. The next prime is 6197131667. The reversal of 6197131649 is 9461317916.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6197131631) and next prime (6197131667).

It can be written as a sum of positive squares in 2 ways, for example, as 1119571600 + 5077560049 = 33460^2 + 71257^2 .

It is a cyclic number.

It is not a de Polignac number, because 6197131649 - 2³² = 1902164353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6197131609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27420824 + ... + 27421049.

It is an arithmetic number, because the mean of its divisors is an integer number (1562993409).

Almost surely, 2^6197131649 is an apocalyptic number.

It is an amenable number.

6197131649 is a deficient number, since it is larger than the sum of its proper divisors (54841987).

6197131649 is a wasteful number, since it uses less digits than its factorization.

6197131649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54841986.

The product of its digits is 244944, while the sum is 47.

The square root of 6197131649 is about 78721.8625859424. The cubic root of 6197131649 is about 1836.8072041360.

The spelling of 6197131649 in words is "six billion, one hundred ninety-seven million, one hundred thirty-one thousand, six hundred forty-nine".