7479378847647 has 24 divisors (see below), whose sum is σ = 12382493026176. Its totient is φ = 4261613954256.

The previous prime is 7479378847601. The next prime is 7479378847711. The reversal of 7479378847647 is 7467488739747.

7479378847647 is a `hidden beast` number, since 7 + 4 + 79 + 3 + 78 + 8 + 476 + 4 + 7 = 666.

It is not a de Polignac number, because 7479378847647 - 2⁷ = 7479378847519 is a prime.

It is a super-2 number, since 2×7479378847647² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7479378847247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171044853 + ... + 171088574.

It is an arithmetic number, because the mean of its divisors is an integer number (515937209424).

Almost surely, 2^{7479378847647} is an apocalyptic number.

7479378847647 is a deficient number, since it is larger than the sum of its proper divisors (4903114178529).

7479378847647 is a wasteful number, since it uses less digits than its factorization.

7479378847647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342133787 (or 342133784 counting only the distinct ones).

The product of its digits is 11152318464, while the sum is 81.

The spelling of 7479378847647 in words is "seven trillion, four hundred seventy-nine billion, three hundred seventy-eight million, eight hundred forty-seven thousand, six hundred forty-seven".