440461312123451 has 4 divisors (see below), whose sum is σ = 440733034094304. Its totient is φ = 440189590152600.

The previous prime is 440461312123433. The next prime is 440461312123501. The reversal of 440461312123451 is 154321213164044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440461312123451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440461312123399 and 440461312123408.

It is not an unprimeable number, because it can be changed into a prime (440461312143451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135860982995 + ... + 135860986236.

It is an arithmetic number, because the mean of its divisors is an integer number (110183258523576).

Almost surely, 2^{440461312123451} is an apocalyptic number.

440461312123451 is a deficient number, since it is larger than the sum of its proper divisors (271721970853).

440461312123451 is a wasteful number, since it uses less digits than its factorization.

440461312123451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271721970852.

The product of its (nonzero) digits is 276480, while the sum is 41.

Adding to 440461312123451 its reverse (154321213164044), we get a palindrome (594782525287495).

The spelling of 440461312123451 in words is "four hundred forty trillion, four hundred sixty-one billion, three hundred twelve million, one hundred twenty-three thousand, four hundred fifty-one".