387123662565 has 12 divisors (see below), whose sum is σ = 671014348524. Its totient is φ = 206465953344.

The previous prime is 387123662551. The next prime is 387123662581. The reversal of 387123662565 is 565266321783.

387123662565 is a `hidden beast` number, since 3 + 8 + 7 + 1 + 2 + 3 + 6 + 625 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 138515719329 + 248607943236 = 372177^2 + 498606^2 .

It is not a de Polignac number, because 387123662565 - 2⁸ = 387123662309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4301373984 + ... + 4301374073.

It is an arithmetic number, because the mean of its divisors is an integer number (55917862377).

Almost surely, 2^387123662565 is an apocalyptic number.

It is an amenable number.

387123662565 is a deficient number, since it is larger than the sum of its proper divisors (283890685959).

387123662565 is a wasteful number, since it uses less digits than its factorization.

387123662565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8602748068 (or 8602748065 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 387123662565 in words is "three hundred eighty-seven billion, one hundred twenty-three million, six hundred sixty-two thousand, five hundred sixty-five".