785504907987 has 4 divisors (see below), whose sum is σ = 1047339877320. Its totient is φ = 523669938656.

The previous prime is 785504907983. The next prime is 785504907997. The reversal of 785504907987 is 789709405587.

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

It is a cyclic number.

It is not a de Polignac number, because 785504907987 - 2² = 785504907983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (785504907983) 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, 130917484662 + ... + 130917484667.

It is an arithmetic number, because the mean of its divisors is an integer number (261834969330).

Almost surely, 2^785504907987 is an apocalyptic number.

785504907987 is a deficient number, since it is larger than the sum of its proper divisors (261834969333).

785504907987 is a wasteful number, since it uses less digits than its factorization.

785504907987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261834969332.

The product of its (nonzero) digits is 177811200, while the sum is 69.

The spelling of 785504907987 in words is "seven hundred eighty-five billion, five hundred four million, nine hundred seven thousand, nine hundred eighty-seven".