742351811778 has 48 divisors (see below), whose sum is σ = 1757979265536. Its totient is φ = 225381951360.

The previous prime is 742351811749. The next prime is 742351811779. The reversal of 742351811778 is 877118153247.

742351811778 is a `hidden beast` number, since 7 + 4 + 2 + 3 + 518 + 117 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (742351811779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39119326 + ... + 39138297.

It is an arithmetic number, because the mean of its divisors is an integer number (36624568032).

Almost surely, 2^742351811778 is an apocalyptic number.

742351811778 is an abundant number, since it is smaller than the sum of its proper divisors (1015627453758).

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

742351811778 is a wasteful number, since it uses less digits than its factorization.

742351811778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78257679 (or 78257676 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 54.

The spelling of 742351811778 in words is "seven hundred forty-two billion, three hundred fifty-one million, eight hundred eleven thousand, seven hundred seventy-eight".