73990899450 has 288 divisors, whose sum is σ = 227493158256. Its totient is φ = 17079828480.

The previous prime is 73990899427. The next prime is 73990899481. The reversal of 73990899450 is 5499809937.

It is a happy number.

73990899450 is a `hidden beast` number, since 7 + 3 + 9 + 90 + 8 + 99 + 450 = 666.

It can be written as a sum of positive squares in 24 ways, for example, as 23232161241 + 50758738209 = 152421^2 + 225297^2 .

It is an unprimeable number.

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 in 143 ways as a sum of consecutive naturals, for example, 31126662 + ... + 31129038.

Almost surely, 2^73990899450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73990899450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113746579128).

73990899450 is an abundant number, since it is smaller than the sum of its proper divisors (153502258806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73990899450 is a wasteful number, since it uses less digits than its factorization.

73990899450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 73990899450 in words is "seventy-three billion, nine hundred ninety million, eight hundred ninety-nine thousand, four hundred fifty".