99387261505 has 8 divisors (see below), whose sum is σ = 136302530112. Its totient is φ = 68151265008.

The previous prime is 99387261503. The next prime is 99387261553. The reversal of 99387261505 is 50516278399.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99387261505 - 2¹ = 99387261503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99387261503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1419817987 + ... + 1419818056.

It is an arithmetic number, because the mean of its divisors is an integer number (17037816264).

Almost surely, 2^99387261505 is an apocalyptic number.

It is an amenable number.

99387261505 is a deficient number, since it is larger than the sum of its proper divisors (36915268607).

99387261505 is a wasteful number, since it uses less digits than its factorization.

99387261505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839636055.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 99387261505 in words is "ninety-nine billion, three hundred eighty-seven million, two hundred sixty-one thousand, five hundred five".