6497990061 has 16 divisors (see below), whose sum is σ = 9285028224. Its totient is φ = 4031653824.

The previous prime is 6497990041. The next prime is 6497990069. The reversal of 6497990061 is 1600997946.

It is not a de Polignac number, because 6497990061 - 2¹⁵ = 6497957293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6497989986 and 6497990013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497990069) 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 15 ways as a sum of consecutive naturals, for example, 1270066 + ... + 1275171.

It is an arithmetic number, because the mean of its divisors is an integer number (580314264).

Almost surely, 2^6497990061 is an apocalyptic number.

It is an amenable number.

6497990061 is a deficient number, since it is larger than the sum of its proper divisors (2787038163).

6497990061 is a wasteful number, since it uses less digits than its factorization.

6497990061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545300.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 6497990061 is about 80610.1114066964. Note that the first 3 decimals coincide. The cubic root of 6497990061 is about 1866.0631965331.

The spelling of 6497990061 in words is "six billion, four hundred ninety-seven million, nine hundred ninety thousand, sixty-one".