73621130651543 has 4 divisors (see below), whose sum is σ = 73707439129128. Its totient is φ = 73534822173960.

The previous prime is 73621130651479. The next prime is 73621130651569. The reversal of 73621130651543 is 34515603112637.

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

It is a cyclic number.

It is not a de Polignac number, because 73621130651543 - 2⁶ = 73621130651479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73621130651573) 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, 43154237513 + ... + 43154239218.

It is an arithmetic number, because the mean of its divisors is an integer number (18426859782282).

Almost surely, 2^{73621130651543} is an apocalyptic number.

73621130651543 is a deficient number, since it is larger than the sum of its proper divisors (86308477585).

73621130651543 is an equidigital number, since it uses as much as digits as its factorization.

73621130651543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86308477584.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 73621130651543 in words is "seventy-three trillion, six hundred twenty-one billion, one hundred thirty million, six hundred fifty-one thousand, five hundred forty-three".