73774647738 has 48 divisors (see below), whose sum is σ = 174879128736. Its totient is φ = 22291506720.

The previous prime is 73774647719. The next prime is 73774647761. The reversal of 73774647738 is 83774647737.

73774647738 is a `hidden beast` number, since 7 + 3 + 77 + 464 + 77 + 38 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 468181 + ... + 605592.

It is an arithmetic number, because the mean of its divisors is an integer number (3643315182).

Almost surely, 2^73774647738 is an apocalyptic number.

73774647738 is an abundant number, since it is smaller than the sum of its proper divisors (101104480998).

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

73774647738 is a wasteful number, since it uses less digits than its factorization.

73774647738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074139 (or 1074136 counting only the distinct ones).

The product of its digits is 116169984, while the sum is 63.

Subtracting 73774647738 from its reverse (83774647737), we obtain a palindrome (9999999999).

The spelling of 73774647738 in words is "seventy-three billion, seven hundred seventy-four million, six hundred forty-seven thousand, seven hundred thirty-eight".