787660284121 has 4 divisors (see below), whose sum is σ = 787691842000. Its totient is φ = 787628726244.

The previous prime is 787660284077. The next prime is 787660284127. The reversal of 787660284121 is 121482066787.

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 787660284121 - 2⁹ = 787660283609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787660284127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15741471 + ... + 15791428.

It is an arithmetic number, because the mean of its divisors is an integer number (196922960500).

Almost surely, 2^787660284121 is an apocalyptic number.

It is an amenable number.

787660284121 is a deficient number, since it is larger than the sum of its proper divisors (31557879).

787660284121 is a wasteful number, since it uses less digits than its factorization.

787660284121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31557878.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 787660284121 in words is "seven hundred eighty-seven billion, six hundred sixty million, two hundred eighty-four thousand, one hundred twenty-one".