747686385477 has 20 divisors (see below), whose sum is σ = 1117155557760. Its totient is φ = 498349890504.

The previous prime is 747686385461. The next prime is 747686385487. The reversal of 747686385477 is 774583686747.

747686385477 is a `hidden beast` number, since 7 + 4 + 76 + 8 + 6 + 3 + 8 + 547 + 7 = 666.

747686385477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 747686385477 - 2⁴ = 747686385461 is a prime.

It is a super-2 number, since 2×747686385477² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747686385487) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 619143 + ... + 1370660.

It is an arithmetic number, because the mean of its divisors is an integer number (55857777888).

Almost surely, 2^747686385477 is an apocalyptic number.

It is an amenable number.

747686385477 is a deficient number, since it is larger than the sum of its proper divisors (369469172283).

747686385477 is a wasteful number, since it uses less digits than its factorization.

747686385477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994454 (or 1994445 counting only the distinct ones).

The product of its digits is 1327656960, while the sum is 72.

The spelling of 747686385477 in words is "seven hundred forty-seven billion, six hundred eighty-six million, three hundred eighty-five thousand, four hundred seventy-seven".