99990000007950 has 192 divisors, whose sum is σ = 285674102562240. Its totient is φ = 22926287831040.

The previous prime is 99990000007943. The next prime is 99990000007951. The reversal of 99990000007950 is 5970000009999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990000007951) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12332335 + ... + 18763434.

It is an arithmetic number, because the mean of its divisors is an integer number (1487885950845).

Almost surely, 2^{99990000007950} is an apocalyptic number.

99990000007950 is an abundant number, since it is smaller than the sum of its proper divisors (185684102554290).

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

99990000007950 is a wasteful number, since it uses less digits than its factorization.

99990000007950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31095911 (or 31095906 counting only the distinct ones).

The product of its (nonzero) digits is 2066715, while the sum is 57.

The spelling of 99990000007950 in words is "ninety-nine trillion, nine hundred ninety billion, seven thousand, nine hundred fifty".