4451297788665 has 48 divisors (see below), whose sum is σ = 9496101957888. Its totient is φ = 1878349834368.

The previous prime is 4451297788661. The next prime is 4451297788669. The reversal of 4451297788665 is 5668877921544.

4451297788665 is a `hidden beast` number, since 4 + 451 + 2 + 97 + 7 + 8 + 86 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (4451297788661) and next prime (4451297788669).

It is not a de Polignac number, because 4451297788665 - 2² = 4451297788661 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4451297788593 and 4451297788602.

It is not an unprimeable number, because it can be changed into a prime (4451297788661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 543499909 + ... + 543508098.

It is an arithmetic number, because the mean of its divisors is an integer number (197835457456).

Almost surely, 2^{4451297788665} is an apocalyptic number.

4451297788665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4451297788665 is an abundant number, since it is smaller than the sum of its proper divisors (5044804169223).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4451297788665 is a wasteful number, since it uses less digits than its factorization.

4451297788665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087008038 (or 1087008035 counting only the distinct ones).

The product of its digits is 812851200, while the sum is 72.

The spelling of 4451297788665 in words is "four trillion, four hundred fifty-one billion, two hundred ninety-seven million, seven hundred eighty-eight thousand, six hundred sixty-five".