7834021553 has 2 divisors, whose sum is σ = 7834021554. Its totient is φ = 7834021552.

The previous prime is 7834021541. The next prime is 7834021561. The reversal of 7834021553 is 3551204387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6813346849 + 1020674704 = 82543^2 + 31948^2 .

It is a cyclic number.

It is not a de Polignac number, because 7834021553 - 2¹⁴ = 7834005169 is a prime.

It is a super-2 number, since 2×7834021553² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7834023553) 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 as a sum of consecutive naturals, namely, 3917010776 + 3917010777.

It is an arithmetic number, because the mean of its divisors is an integer number (3917010777).

Almost surely, 2^7834021553 is an apocalyptic number.

It is an amenable number.

7834021553 is a deficient number, since it is larger than the sum of its proper divisors (1).

7834021553 is an equidigital number, since it uses as much as digits as its factorization.

7834021553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 7834021553 is about 88510.0082081117. The cubic root of 7834021553 is about 1986.0716889982.

The spelling of 7834021553 in words is "seven billion, eight hundred thirty-four million, twenty-one thousand, five hundred fifty-three".