73161639678 has 16 divisors (see below), whose sum is σ = 146333310336. Its totient is φ = 24385541400.

The previous prime is 73161639641. The next prime is 73161639689. The reversal of 73161639678 is 87693616137.

It is a congruent number.

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, 321426 + ... + 499637.

It is an arithmetic number, because the mean of its divisors is an integer number (9145831896).

Almost surely, 2^73161639678 is an apocalyptic number.

73161639678 is an abundant number, since it is smaller than the sum of its proper divisors (73171670658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73161639678 is a wasteful number, since it uses less digits than its factorization.

73161639678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835919.

The product of its digits is 6858432, while the sum is 57.

The spelling of 73161639678 in words is "seventy-three billion, one hundred sixty-one million, six hundred thirty-nine thousand, six hundred seventy-eight".