73758641640 has 32 divisors (see below), whose sum is σ = 221275925280. Its totient is φ = 19668971072.

The previous prime is 73758641519. The next prime is 73758641641. The reversal of 73758641640 is 4614685737.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (73758641641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307327554 + ... + 307327793.

It is an arithmetic number, because the mean of its divisors is an integer number (6914872665).

Almost surely, 2^73758641640 is an apocalyptic number.

It is an amenable number.

73758641640 is an abundant number, since it is smaller than the sum of its proper divisors (147517283640).

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

73758641640 is a wasteful number, since it uses less digits than its factorization.

73758641640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614655361 (or 614655357 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 73758641640 in words is "seventy-three billion, seven hundred fifty-eight million, six hundred forty-one thousand, six hundred forty".