99780645458 has 16 divisors (see below), whose sum is σ = 161231489496. Its totient is φ = 46039071360.

The previous prime is 99780645421. The next prime is 99780645473. The reversal of 99780645458 is 85454608799.

It can be written as a sum of positive squares in 4 ways, for example, as 99532047169 + 248598289 = 315487^2 + 15767^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99780645394 and 99780645403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473483 + ... + 650958.

Almost surely, 2^99780645458 is an apocalyptic number.

99780645458 is a deficient number, since it is larger than the sum of its proper divisors (61450844038).

99780645458 is a wasteful number, since it uses less digits than its factorization.

99780645458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127869.

The product of its (nonzero) digits is 87091200, while the sum is 65.

The spelling of 99780645458 in words is "ninety-nine billion, seven hundred eighty million, six hundred forty-five thousand, four hundred fifty-eight".