8618472561951 has 48 divisors (see below), whose sum is σ = 14390875886400. Its totient is φ = 4868254347264.

The previous prime is 8618472561949. The next prime is 8618472561971. The reversal of 8618472561951 is 1591652748168.

8618472561951 is a `hidden beast` number, since 8 + 6 + 1 + 8 + 4 + 7 + 2 + 5 + 619 + 5 + 1 = 666.

It is not a de Polignac number, because 8618472561951 - 2¹ = 8618472561949 is a prime.

It is a super-2 number, since 2×8618472561951² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8618472561971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21834295 + ... + 22225511.

It is an arithmetic number, because the mean of its divisors is an integer number (299809914300).

Almost surely, 2^{8618472561951} is an apocalyptic number.

8618472561951 is a deficient number, since it is larger than the sum of its proper divisors (5772403324449).

8618472561951 is a wasteful number, since it uses less digits than its factorization.

8618472561951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395248 (or 395245 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 63.

The spelling of 8618472561951 in words is "eight trillion, six hundred eighteen billion, four hundred seventy-two million, five hundred sixty-one thousand, nine hundred fifty-one".