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491856414677 is a prime number
BaseRepresentation
bin1110010100001001110…
…11010100011111010101
31202000120022121201022022
413022010323110133111
531024310220232202
61013542233542525
750351442354155
oct7120473243725
91660508551268
10491856414677
1117a66013a2a1
127b3a9874a45
13374c6c43734
1419b3d860765
15cbdac23ea2
hex7284ed47d5

491856414677 has 2 divisors, whose sum is σ = 491856414678. Its totient is φ = 491856414676.

The previous prime is 491856414391. The next prime is 491856414961. The reversal of 491856414677 is 776414658194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366114545476 + 125741869201 = 605074^2 + 354601^2 .

It is a cyclic number.

It is not a de Polignac number, because 491856414677 - 212 = 491856410581 is a prime.

It is a lonely number, since its distance to closest prime (491856414961) sets a new record.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491856413677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245928207338 + 245928207339.

It is an arithmetic number, because the mean of its divisors is an integer number (245928207339).

Almost surely, 2491856414677 is an apocalyptic number.

It is an amenable number.

491856414677 is a deficient number, since it is larger than the sum of its proper divisors (1).

491856414677 is an equidigital number, since it uses as much as digits as its factorization.

491856414677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 62.

The spelling of 491856414677 in words is "four hundred ninety-one billion, eight hundred fifty-six million, four hundred fourteen thousand, six hundred seventy-seven".