4787391786957 has 72 divisors (see below), whose sum is σ = 7524807527328. Its totient is φ = 2931622761600.

The previous prime is 4787391786949. The next prime is 4787391786997. The reversal of 4787391786957 is 7596871937874.

4787391786957 is a `hidden beast` number, since 4 + 78 + 7 + 391 + 78 + 6 + 95 + 7 = 666.

It is not a de Polignac number, because 4787391786957 - 2³ = 4787391786949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4787391786997) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 341681082 + ... + 341695092.

Almost surely, 2^{4787391786957} is an apocalyptic number.

It is an amenable number.

4787391786957 is a deficient number, since it is larger than the sum of its proper divisors (2737415740371).

4787391786957 is a wasteful number, since it uses less digits than its factorization.

4787391786957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15131 (or 15115 counting only the distinct ones).

The product of its digits is 4480842240, while the sum is 81.

The spelling of 4787391786957 in words is "four trillion, seven hundred eighty-seven billion, three hundred ninety-one million, seven hundred eighty-six thousand, nine hundred fifty-seven".