395399778487 has 16 divisors (see below), whose sum is σ = 460614434112. Its totient is φ = 332373000960.

The previous prime is 395399778481. The next prime is 395399778623. The reversal of 395399778487 is 784877993593.

It is not a de Polignac number, because 395399778487 - 2¹¹ = 395399776439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395399778481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612633 + ... + 1079869.

It is an arithmetic number, because the mean of its divisors is an integer number (28788402132).

Almost surely, 2^395399778487 is an apocalyptic number.

395399778487 is a deficient number, since it is larger than the sum of its proper divisors (65214655625).

395399778487 is a wasteful number, since it uses less digits than its factorization.

395399778487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469578.

The product of its digits is 2880541440, while the sum is 79.

The spelling of 395399778487 in words is "three hundred ninety-five billion, three hundred ninety-nine million, seven hundred seventy-eight thousand, four hundred eighty-seven".