73126570381 has 8 divisors (see below), whose sum is σ = 73650648344. Its totient is φ = 72603812160.

The previous prime is 73126570379. The next prime is 73126570427. The reversal of 73126570381 is 18307562137.

It can be written as a sum of positive squares in 4 ways, for example, as 20173657156 + 52952913225 = 142034^2 + 230115^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 73126570381 - 2¹ = 73126570379 is a prime.

It is a super-2 number, since 2×73126570381² (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 (73126570301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218586 + ... + 440491.

It is an arithmetic number, because the mean of its divisors is an integer number (9206331043).

Almost surely, 2^73126570381 is an apocalyptic number.

It is an amenable number.

73126570381 is a deficient number, since it is larger than the sum of its proper divisors (524077963).

73126570381 is a wasteful number, since it uses less digits than its factorization.

73126570381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659871.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 73126570381 in words is "seventy-three billion, one hundred twenty-six million, five hundred seventy thousand, three hundred eighty-one".