73645574890 has 12 divisors (see below), whose sum is σ = 132563579526. Its totient is φ = 29457886688.

The previous prime is 73645574881. The next prime is 73645574903. The reversal of 73645574890 is 9847554637.

It can be written as a sum of positive squares in 3 ways, for example, as 57179809129 + 16465765761 = 239123^2 + 128319^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 815262 + ... + 901078.

Almost surely, 2^73645574890 is an apocalyptic number.

73645574890 is a deficient number, since it is larger than the sum of its proper divisors (58918004636).

73645574890 is an frugal number, since it uses more digits than its factorization.

73645574890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171641 (or 85824 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 73645574890 in words is "seventy-three billion, six hundred forty-five million, five hundred seventy-four thousand, eight hundred ninety".