73030041781 has 4 divisors (see below), whose sum is σ = 75003826732. Its totient is φ = 71056256832.

The previous prime is 73030041767. The next prime is 73030041803. The reversal of 73030041781 is 18714003037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18714003037 = 179 ⋅104547503.

It can be written as a sum of positive squares in 2 ways, for example, as 54366383556 + 18663658225 = 233166^2 + 136615^2 .

It is a cyclic number.

It is not a de Polignac number, because 73030041781 - 2¹⁹ = 73029517493 is a prime.

It is a super-2 number, since 2×73030041781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73030041701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986892420 + ... + 986892493.

It is an arithmetic number, because the mean of its divisors is an integer number (18750956683).

Almost surely, 2^73030041781 is an apocalyptic number.

It is an amenable number.

73030041781 is a deficient number, since it is larger than the sum of its proper divisors (1973784951).

73030041781 is a wasteful number, since it uses less digits than its factorization.

73030041781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973784950.

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 73030041781 in words is "seventy-three billion, thirty million, forty-one thousand, seven hundred eighty-one".