73777740738 has 32 divisors (see below), whose sum is σ = 161599233600. Its totient is φ = 22316081856.

The previous prime is 73777740737. The next prime is 73777740761. The reversal of 73777740738 is 83704777737.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (73777740733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8011233 + ... + 8020436.

It is an arithmetic number, because the mean of its divisors is an integer number (5049976050).

Almost surely, 2^73777740738 is an apocalyptic number.

73777740738 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

73777740738 is an abundant number, since it is smaller than the sum of its proper divisors (87821492862).

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

73777740738 is a wasteful number, since it uses less digits than its factorization.

73777740738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031746.

The product of its (nonzero) digits is 33882912, while the sum is 60.

The spelling of 73777740738 in words is "seventy-three billion, seven hundred seventy-seven million, seven hundred forty thousand, seven hundred thirty-eight".