73406563357 has 4 divisors (see below), whose sum is σ = 74133361116. Its totient is φ = 72679765600.

The previous prime is 73406563333. The next prime is 73406563409. The reversal of 73406563357 is 75336560437.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47763665401 + 25642897956 = 218549^2 + 160134^2 .

It is a cyclic number.

It is not a de Polignac number, because 73406563357 - 2²³ = 73398174749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73406563357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73406593357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363398728 + ... + 363398929.

It is an arithmetic number, because the mean of its divisors is an integer number (18533340279).

Almost surely, 2^73406563357 is an apocalyptic number.

It is an amenable number.

73406563357 is a deficient number, since it is larger than the sum of its proper divisors (726797759).

73406563357 is a wasteful number, since it uses less digits than its factorization.

73406563357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726797758.

The product of its (nonzero) digits is 4762800, while the sum is 49.

The spelling of 73406563357 in words is "seventy-three billion, four hundred six million, five hundred sixty-three thousand, three hundred fifty-seven".