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BaseRepresentation
bin101111010001011111011…
…1100000101001110110101
3212000010101121201022021021
41132202332330011032311
51322422223124111121
621452434131221141
71240256344360030
oct136427674051665
925003347638237
106497193972661
112085498685a97
1288b2491477b1
133818b5050062
141866744a0017
15b4018590641
hex5e8bef053b5

6497193972661 has 12 divisors (see below), whose sum is σ = 7549087387296. Its totient is φ = 5477727917520.

The previous prime is 6497193972623. The next prime is 6497193972667. The reversal of 6497193972661 is 1662793917946.

It is not a de Polignac number, because 6497193972661 - 211 = 6497193970613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497193972667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124694535 + ... + 124746628.

It is an arithmetic number, because the mean of its divisors is an integer number (629090615608).

Almost surely, 26497193972661 is an apocalyptic number.

6497193972661 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6497193972661 is a deficient number, since it is larger than the sum of its proper divisors (1051893414635).

6497193972661 is an equidigital number, since it uses as much as digits as its factorization.

6497193972661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249441292 (or 249441231 counting only the distinct ones).

The product of its digits is 185177664, while the sum is 70.

The spelling of 6497193972661 in words is "six trillion, four hundred ninety-seven billion, one hundred ninety-three million, nine hundred seventy-two thousand, six hundred sixty-one".