73864178537 has 2 divisors, whose sum is σ = 73864178538. Its totient is φ = 73864178536.

The previous prime is 73864178519. The next prime is 73864178573. The reversal of 73864178537 is 73587146837.

Together with next prime (73864178573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70775153296 + 3089025241 = 266036^2 + 55579^2 .

It is a cyclic number.

It is not a de Polignac number, because 73864178537 - 2¹² = 73864174441 is a prime.

It is a super-2 number, since 2×73864178537² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73864168537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36932089268 + 36932089269.

It is an arithmetic number, because the mean of its divisors is an integer number (36932089269).

Almost surely, 2^73864178537 is an apocalyptic number.

It is an amenable number.

73864178537 is a deficient number, since it is larger than the sum of its proper divisors (1).

73864178537 is an equidigital number, since it uses as much as digits as its factorization.

73864178537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 59.

The spelling of 73864178537 in words is "seventy-three billion, eight hundred sixty-four million, one hundred seventy-eight thousand, five hundred thirty-seven".