73873390385 has 8 divisors (see below), whose sum is σ = 88653033576. Its totient is φ = 59095402240.

The previous prime is 73873390337. The next prime is 73873390411. The reversal of 73873390385 is 58309337837.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15006985009 + 58866405376 = 122503^2 + 242624^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-73873390385 is a prime.

It is a super-2 number, since 2×73873390385² (a number of 23 digits) contains 22 as substring.

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 73873390385.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313346 + ... + 495915.

It is an arithmetic number, because the mean of its divisors is an integer number (11081629197).

Almost surely, 2^73873390385 is an apocalyptic number.

It is an amenable number.

73873390385 is a deficient number, since it is larger than the sum of its proper divisors (14779643191).

73873390385 is a wasteful number, since it uses less digits than its factorization.

73873390385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827523.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 73873390385 in words is "seventy-three billion, eight hundred seventy-three million, three hundred ninety thousand, three hundred eighty-five".