742677157664381 has 2 divisors, whose sum is σ = 742677157664382. Its totient is φ = 742677157664380.

The previous prime is 742677157664371. The next prime is 742677157664417. The reversal of 742677157664381 is 183466751776247.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665025637424281 + 77651520240100 = 25788091^2 + 8812010^2 .

It is a cyclic number.

It is not a de Polignac number, because 742677157664381 - 2⁶ = 742677157664317 is a prime.

It is a super-2 number, since 2×742677157664381² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 742677157664299 and 742677157664308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742677157664311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371338578832190 + 371338578832191.

It is an arithmetic number, because the mean of its divisors is an integer number (371338578832191).

Almost surely, 2^{742677157664381} is an apocalyptic number.

It is an amenable number.

742677157664381 is a deficient number, since it is larger than the sum of its proper divisors (1).

742677157664381 is an equidigital number, since it uses as much as digits as its factorization.

742677157664381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1991485440, while the sum is 74.

The spelling of 742677157664381 in words is "seven hundred forty-two trillion, six hundred seventy-seven billion, one hundred fifty-seven million, six hundred sixty-four thousand, three hundred eighty-one".