6542991337 has 2 divisors, whose sum is σ = 6542991338. Its totient is φ = 6542991336.

The previous prime is 6542991319. The next prime is 6542991349. The reversal of 6542991337 is 7331992456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5084973481 + 1458017856 = 71309^2 + 38184^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542991337 - 2¹¹ = 6542989289 is a prime.

It is not a weakly prime, because it can be changed into another prime (6542991317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271495668 + 3271495669.

It is an arithmetic number, because the mean of its divisors is an integer number (3271495669).

Almost surely, 2^6542991337 is an apocalyptic number.

It is an amenable number.

6542991337 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542991337 is an equidigital number, since it uses as much as digits as its factorization.

6542991337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 6542991337 is about 80888.7590274446. The cubic root of 6542991337 is about 1870.3610441318.

The spelling of 6542991337 in words is "six billion, five hundred forty-two million, nine hundred ninety-one thousand, three hundred thirty-seven".