73816817642 has 12 divisors (see below), whose sum is σ = 115748678850. Its totient is φ = 35303694888.

The previous prime is 73816817629. The next prime is 73816817653. The reversal of 73816817642 is 24671861837.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61440032641 + 12376785001 = 247871^2 + 111251^2 .

It is a super-3 number, since 3×73816817642³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34884017 + ... + 34886132.

Almost surely, 2^73816817642 is an apocalyptic number.

73816817642 is a deficient number, since it is larger than the sum of its proper divisors (41931861208).

73816817642 is a wasteful number, since it uses less digits than its factorization.

73816817642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69770197 (or 69770174 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The spelling of 73816817642 in words is "seventy-three billion, eight hundred sixteen million, eight hundred seventeen thousand, six hundred forty-two".