125601216543 has 80 divisors (see below), whose sum is σ = 209001576960. Its totient is φ = 75153283920.

The previous prime is 125601216529. The next prime is 125601216553. The reversal of 125601216543 is 345612106521.

125601216543 is a `hidden beast` number, since 1 + 2 + 5 + 601 + 2 + 1 + 6 + 5 + 43 = 666.

It is not a de Polignac number, because 125601216543 - 2¹⁷ = 125601085471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125601216498 and 125601216507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125601216553) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8509696 + ... + 8524442.

It is an arithmetic number, because the mean of its divisors is an integer number (2612519712).

Almost surely, 2^125601216543 is an apocalyptic number.

125601216543 is a deficient number, since it is larger than the sum of its proper divisors (83400360417).

125601216543 is an equidigital number, since it uses as much as digits as its factorization.

125601216543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14871 (or 14840 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 125601216543 in words is "one hundred twenty-five billion, six hundred one million, two hundred sixteen thousand, five hundred forty-three".