6197716421 has 4 divisors (see below), whose sum is σ = 6674463852. Its totient is φ = 5720968992.

The previous prime is 6197716417. The next prime is 6197716471. The reversal of 6197716421 is 1246177916.

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

It can be written as a sum of positive squares in 2 ways, for example, as 562211521 + 5635504900 = 23711^2 + 75070^2 .

It is a cyclic number.

It is not a de Polignac number, because 6197716421 - 2² = 6197716417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6197716471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238373696 + ... + 238373721.

It is an arithmetic number, because the mean of its divisors is an integer number (1668615963).

Almost surely, 2^6197716421 is an apocalyptic number.

It is an amenable number.

6197716421 is a deficient number, since it is larger than the sum of its proper divisors (476747431).

6197716421 is a wasteful number, since it uses less digits than its factorization.

6197716421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476747430.

The product of its digits is 127008, while the sum is 44.

The square root of 6197716421 is about 78725.5766634961. The cubic root of 6197716421 is about 1836.8649770811.

The spelling of 6197716421 in words is "six billion, one hundred ninety-seven million, seven hundred sixteen thousand, four hundred twenty-one".