99770959637 has 4 divisors (see below), whose sum is σ = 99891602496. Its totient is φ = 99650316780.

The previous prime is 99770959621. The next prime is 99770959657. The reversal of 99770959637 is 73695907799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99770959637 - 2⁴ = 99770959621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99770959657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60320189 + ... + 60321842.

It is an arithmetic number, because the mean of its divisors is an integer number (24972900624).

Almost surely, 2^99770959637 is an apocalyptic number.

It is an amenable number.

99770959637 is a deficient number, since it is larger than the sum of its proper divisors (120642859).

99770959637 is a wasteful number, since it uses less digits than its factorization.

99770959637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120642858.

The product of its (nonzero) digits is 202538070, while the sum is 71.

The spelling of 99770959637 in words is "ninety-nine billion, seven hundred seventy million, nine hundred fifty-nine thousand, six hundred thirty-seven".