999998074746551 has 2 divisors, whose sum is σ = 999998074746552. Its totient is φ = 999998074746550.

The previous prime is 999998074746533. The next prime is 999998074746637. The reversal of 999998074746551 is 155647470899999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999998074746551 - 2³⁸ = 999723196839607 is a prime.

It is a super-2 number, since 2×999998074746551² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998074746521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999037373275 + 499999037373276.

It is an arithmetic number, because the mean of its divisors is an integer number (499999037373276).

Almost surely, 2^{999998074746551} is an apocalyptic number.

999998074746551 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998074746551 is an equidigital number, since it uses as much as digits as its factorization.

999998074746551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55553299200, while the sum is 92.

The spelling of 999998074746551 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, seventy-four million, seven hundred forty-six thousand, five hundred fifty-one".