6291061537 has 2 divisors, whose sum is σ = 6291061538. Its totient is φ = 6291061536.

The previous prime is 6291061489. The next prime is 6291061559. The reversal of 6291061537 is 7351601926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3771925056 + 2519136481 = 61416^2 + 50191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6291061537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6291061537.

It is not a weakly prime, because it can be changed into another prime (6291061037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3145530768 + 3145530769.

It is an arithmetic number, because the mean of its divisors is an integer number (3145530769).

Almost surely, 2^6291061537 is an apocalyptic number.

It is an amenable number.

6291061537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6291061537 is an equidigital number, since it uses as much as digits as its factorization.

6291061537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 6291061537 is about 79316.2123213155. The cubic root of 6291061537 is about 1846.0408672310.

The spelling of 6291061537 in words is "six billion, two hundred ninety-one million, sixty-one thousand, five hundred thirty-seven".