1640504241123 has 8 divisors (see below), whose sum is σ = 2386187987136. Its totient is φ = 994244994600.

The previous prime is 1640504241107. The next prime is 1640504241151. The reversal of 1640504241123 is 3211424050461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1640504241123 - 2⁴ = 1640504241107 is a prime.

It is a super-2 number, since 2×1640504241123² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 49712249731 = 1640504241123 / (1 + 6 + 4 + 0 + 5 + 0 + 4 + 2 + 4 + 1 + 1 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (1640504241193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24856124833 + ... + 24856124898.

It is an arithmetic number, because the mean of its divisors is an integer number (298273498392).

Almost surely, 2^{1640504241123} is an apocalyptic number.

1640504241123 is a deficient number, since it is larger than the sum of its proper divisors (745683746013).

1640504241123 is a wasteful number, since it uses less digits than its factorization.

1640504241123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49712249745.

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 1640504241123 its reverse (3211424050461), we get a palindrome (4851928291584).

The spelling of 1640504241123 in words is "one trillion, six hundred forty billion, five hundred four million, two hundred forty-one thousand, one hundred twenty-three".