99679784651040 has 768 divisors, whose sum is σ = 358651315814400. Its totient is φ = 23035267706880.

The previous prime is 99679784651033. The next prime is 99679784651047. The reversal of 99679784651040 is 4015648797699.

It is an interprime number because it is at equal distance from previous prime (99679784651033) and next prime (99679784651047).

It is not an unprimeable number, because it can be changed into a prime (99679784651047) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 68887203597 + ... + 68887205043.

It is an arithmetic number, because the mean of its divisors is an integer number (466993900800).

Almost surely, 2^{99679784651040} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99679784651040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179325657907200).

99679784651040 is an abundant number, since it is smaller than the sum of its proper divisors (258971531163360).

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

99679784651040 is a wasteful number, since it uses less digits than its factorization.

99679784651040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 75.

The spelling of 99679784651040 in words is "ninety-nine trillion, six hundred seventy-nine billion, seven hundred eighty-four million, six hundred fifty-one thousand, forty".