999999997764122 has 8 divisors (see below), whose sum is σ = 1500368275567476. Its totient is φ = 499877239241632.

The previous prime is 999999997764101. The next prime is 999999997764161. The reversal of 999999997764122 is 221467799999999.

It can be written as a sum of positive squares in 2 ways, for example, as 999990158909641 + 9838854481 = 31622621^2 + 99191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61379810033 + ... + 61379826324.

Almost surely, 2^{999999997764122} is an apocalyptic number.

999999997764122 is a deficient number, since it is larger than the sum of its proper divisors (500368277803354).

999999997764122 is a wasteful number, since it uses less digits than its factorization.

999999997764122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122759640432.

The product of its digits is 202491775584, while the sum is 101.

The spelling of 999999997764122 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-seven million, seven hundred sixty-four thousand, one hundred twenty-two".