4491508785123 has 16 divisors (see below), whose sum is σ = 6304044499200. Its totient is φ = 2836664756640.

The previous prime is 4491508785121. The next prime is 4491508785151. The reversal of 4491508785123 is 3215878051944.

It is a Cunningham number, because it is equal to 2119318²-1.

It is not a de Polignac number, because 4491508785123 - 2¹ = 4491508785121 is a prime.

It is a super-2 number, since 2×4491508785123² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (4491508785121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1059658 + ... + 3178976.

It is an arithmetic number, because the mean of its divisors is an integer number (394002781200).

Almost surely, 2^{4491508785123} is an apocalyptic number.

4491508785123 is a deficient number, since it is larger than the sum of its proper divisors (1812535714077).

4491508785123 is a wasteful number, since it uses less digits than its factorization.

4491508785123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156522.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 4491508785123 in words is "four trillion, four hundred ninety-one billion, five hundred eight million, seven hundred eighty-five thousand, one hundred twenty-three".