618497976447 has 20 divisors (see below), whose sum is σ = 995000545000. Its totient is φ = 380614138704.

The previous prime is 618497976443. The next prime is 618497976461. The reversal of 618497976447 is 744679794816.

618497976447 is a `hidden beast` number, since 6 + 1 + 8 + 4 + 97 + 97 + 6 + 447 = 666.

It is not a de Polignac number, because 618497976447 - 2² = 618497976443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618497976443) 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, 293682697 + ... + 293684802.

It is an arithmetic number, because the mean of its divisors is an integer number (49750027250).

Almost surely, 2^618497976447 is an apocalyptic number.

618497976447 is a deficient number, since it is larger than the sum of its proper divisors (376502568553).

618497976447 is a wasteful number, since it uses less digits than its factorization.

618497976447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587367524 (or 587367515 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 72.

The spelling of 618497976447 in words is "six hundred eighteen billion, four hundred ninety-seven million, nine hundred seventy-six thousand, four hundred forty-seven".