99306538778 has 8 divisors (see below), whose sum is σ = 148969202772. Its totient is φ = 49650137856.

The previous prime is 99306538763. The next prime is 99306538783. The reversal of 99306538778 is 87783560399.

It can be written as a sum of positive squares in 2 ways, for example, as 87697122769 + 11609416009 = 296137^2 + 107747^2 .

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, 1525925 + ... + 1589672.

Almost surely, 2^99306538778 is an apocalyptic number.

99306538778 is a deficient number, since it is larger than the sum of its proper divisors (49662663994).

99306538778 is a wasteful number, since it uses less digits than its factorization.

99306538778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131536.

The product of its (nonzero) digits is 68584320, while the sum is 65.

The spelling of 99306538778 in words is "ninety-nine billion, three hundred six million, five hundred thirty-eight thousand, seven hundred seventy-eight".