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1997235451366 = 2998617725683
BaseRepresentation
bin11101000100000100100…
…000100111010111100110
321001221012202212020011221
4131010010200213113212
5230210314233420431
64125303423050554
7264203233141351
oct35040440472746
97057182766157
101997235451366
11700028387551
122830b2140a5a
1311645289a48c
146c949657298
1536e45447111
hex1d1048275e6

1997235451366 has 4 divisors (see below), whose sum is σ = 2995853177052. Its totient is φ = 998617725682.

The previous prime is 1997235451363. The next prime is 1997235451373. The reversal of 1997235451366 is 6631545327991.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997235451363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499308862840 + ... + 499308862843.

It is an arithmetic number, because the mean of its divisors is an integer number (748963294263).

Almost surely, 21997235451366 is an apocalyptic number.

1997235451366 is a deficient number, since it is larger than the sum of its proper divisors (998617725686).

1997235451366 is an equidigital number, since it uses as much as digits as its factorization.

1997235451366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998617725685.

The product of its digits is 36741600, while the sum is 61.

The spelling of 1997235451366 in words is "one trillion, nine hundred ninety-seven billion, two hundred thirty-five million, four hundred fifty-one thousand, three hundred sixty-six".

Divisors: 1 2 998617725683 1997235451366