73457421685 has 8 divisors (see below), whose sum is σ = 93334135896. Its totient is φ = 55309117440.

The previous prime is 73457421649. The next prime is 73457421761. The reversal of 73457421685 is 58612475437.

It can be written as a sum of positive squares in 4 ways, for example, as 11268034801 + 62189386884 = 106151^2 + 249378^2 .

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

It is not a de Polignac number, because 73457421685 - 2¹³ = 73457413493 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 432102396 + ... + 432102565.

It is an arithmetic number, because the mean of its divisors is an integer number (11666766987).

Almost surely, 2^73457421685 is an apocalyptic number.

It is an amenable number.

73457421685 is a deficient number, since it is larger than the sum of its proper divisors (19876714211).

73457421685 is a wasteful number, since it uses less digits than its factorization.

73457421685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864204983.

The product of its digits is 5644800, while the sum is 52.

The spelling of 73457421685 in words is "seventy-three billion, four hundred fifty-seven million, four hundred twenty-one thousand, six hundred eighty-five".