1518681903951 has 8 divisors (see below), whose sum is σ = 2050540967680. Its totient is φ = 999638721432.

The previous prime is 1518681903887. The next prime is 1518681903967. The reversal of 1518681903951 is 1593091868151.

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

It is not a de Polignac number, because 1518681903951 - 2⁶ = 1518681903887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1518681903891 and 1518681903900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1518681902951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3203970025 + ... + 3203970498.

It is an arithmetic number, because the mean of its divisors is an integer number (256317620960).

Almost surely, 2^{1518681903951} is an apocalyptic number.

1518681903951 is a deficient number, since it is larger than the sum of its proper divisors (531859063729).

1518681903951 is an equidigital number, since it uses as much as digits as its factorization.

1518681903951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6407940605.

The product of its (nonzero) digits is 2332800, while the sum is 57.

The spelling of 1518681903951 in words is "one trillion, five hundred eighteen billion, six hundred eighty-one million, nine hundred three thousand, nine hundred fifty-one".