73426613881 has 2 divisors, whose sum is σ = 73426613882. Its totient is φ = 73426613880.

The previous prime is 73426613851. The next prime is 73426613927. The reversal of 73426613881 is 18831662437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61911392400 + 11515221481 = 248820^2 + 107309^2 .

It is a cyclic number.

It is not a de Polignac number, because 73426613881 - 2¹⁹ = 73426089593 is a prime.

It is a super-2 number, since 2×73426613881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73426613801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36713306940 + 36713306941.

It is an arithmetic number, because the mean of its divisors is an integer number (36713306941).

Almost surely, 2^73426613881 is an apocalyptic number.

It is an amenable number.

73426613881 is a deficient number, since it is larger than the sum of its proper divisors (1).

73426613881 is an equidigital number, since it uses as much as digits as its factorization.

73426613881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The spelling of 73426613881 in words is "seventy-three billion, four hundred twenty-six million, six hundred thirteen thousand, eight hundred eighty-one".