99997489029851 has 4 divisors (see below), whose sum is σ = 114282844605552. Its totient is φ = 85712133454152.

The previous prime is 99997489029773. The next prime is 99997489029877. The reversal of 99997489029851 is 15892098479999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99997489029851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99997489025851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7142677787840 + ... + 7142677787853.

It is an arithmetic number, because the mean of its divisors is an integer number (28570711151388).

Almost surely, 2^{99997489029851} is an apocalyptic number.

99997489029851 is a deficient number, since it is larger than the sum of its proper divisors (14285355575701).

99997489029851 is a wasteful number, since it uses less digits than its factorization.

99997489029851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14285355575700.

The product of its (nonzero) digits is 9523422720, while the sum is 89.

The spelling of 99997489029851 in words is "ninety-nine trillion, nine hundred ninety-seven billion, four hundred eighty-nine million, twenty-nine thousand, eight hundred fifty-one".