73640352518 has 4 divisors (see below), whose sum is σ = 110460528780. Its totient is φ = 36820176258.

The previous prime is 73640352439. The next prime is 73640352593. The reversal of 73640352518 is 81525304637.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18410088128 + ... + 18410088131.

It is an arithmetic number, because the mean of its divisors is an integer number (27615132195).

Almost surely, 2^73640352518 is an apocalyptic number.

73640352518 is a deficient number, since it is larger than the sum of its proper divisors (36820176262).

73640352518 is a wasteful number, since it uses less digits than its factorization.

73640352518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36820176261.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 73640352518 in words is "seventy-three billion, six hundred forty million, three hundred fifty-two thousand, five hundred eighteen".