54321611612345 has 24 divisors (see below), whose sum is σ = 81886462469952. Its totient is φ = 33862822820640.

The previous prime is 54321611612339. The next prime is 54321611612347.

54321611612345 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 54321611612345 - 2¹⁴ = 54321611595961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54321611612296 and 54321611612305.

It is not an unprimeable number, because it can be changed into a prime (54321611612347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6413409179 + ... + 6413417648.

It is an arithmetic number, because the mean of its divisors is an integer number (3411935936248).

Almost surely, 2^{54321611612345} is an apocalyptic number.

54321611612345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54321611612345 is a deficient number, since it is larger than the sum of its proper divisors (27564850857607).

54321611612345 is a wasteful number, since it uses less digits than its factorization.

54321611612345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12826826861 (or 12826826850 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The spelling of 54321611612345 in words is "fifty-four trillion, three hundred twenty-one billion, six hundred eleven million, six hundred twelve thousand, three hundred forty-five".