73276643457 has 12 divisors (see below), whose sum is σ = 105846504660. Its totient is φ = 48849958368.

The previous prime is 73276643431. The next prime is 73276643459. The reversal of 73276643457 is 75434667237.

73276643457 is a `hidden beast` number, since 73 + 27 + 66 + 43 + 457 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49347956736 + 23928686721 = 222144^2 + 154689^2 .

It is not a de Polignac number, because 73276643457 - 2¹⁰ = 73276642433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73276643459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530223 + ... + 653979.

It is an arithmetic number, because the mean of its divisors is an integer number (8820542055).

Almost surely, 2^73276643457 is an apocalyptic number.

It is an amenable number.

73276643457 is a deficient number, since it is larger than the sum of its proper divisors (32569861203).

73276643457 is a wasteful number, since it uses less digits than its factorization.

73276643457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189552 (or 189549 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 54.

The spelling of 73276643457 in words is "seventy-three billion, two hundred seventy-six million, six hundred forty-three thousand, four hundred fifty-seven".