73877661731 has 2 divisors, whose sum is σ = 73877661732. Its totient is φ = 73877661730.

The previous prime is 73877661707. The next prime is 73877661779. The reversal of 73877661731 is 13716677837.

It is a weak prime.

It is an emirp because it is prime and its reverse (13716677837) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73877661731 - 2¹⁰ = 73877660707 is a prime.

It is a super-2 number, since 2×73877661731² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73877661701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36938830865 + 36938830866.

It is an arithmetic number, because the mean of its divisors is an integer number (36938830866).

Almost surely, 2^73877661731 is an apocalyptic number.

73877661731 is a deficient number, since it is larger than the sum of its proper divisors (1).

73877661731 is an equidigital number, since it uses as much as digits as its factorization.

73877661731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6223392, while the sum is 56.

The spelling of 73877661731 in words is "seventy-three billion, eight hundred seventy-seven million, six hundred sixty-one thousand, seven hundred thirty-one".