742778895049651 has 2 divisors, whose sum is σ = 742778895049652. Its totient is φ = 742778895049650.

The previous prime is 742778895049649. The next prime is 742778895049687. The reversal of 742778895049651 is 156940598877247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 742778895049651 - 2¹ = 742778895049649 is a prime.

Together with 742778895049649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (742778895049601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371389447524825 + 371389447524826.

It is an arithmetic number, because the mean of its divisors is an integer number (371389447524826).

Almost surely, 2^{742778895049651} is an apocalyptic number.

742778895049651 is a deficient number, since it is larger than the sum of its proper divisors (1).

742778895049651 is an equidigital number, since it uses as much as digits as its factorization.

742778895049651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8534937600, while the sum is 82.

The spelling of 742778895049651 in words is "seven hundred forty-two trillion, seven hundred seventy-eight billion, eight hundred ninety-five million, forty-nine thousand, six hundred fifty-one".