774978055542 has 16 divisors (see below), whose sum is σ = 1722173456880. Its totient is φ = 258326018496.

The previous prime is 774978055519. The next prime is 774978055559. The reversal of 774978055542 is 245550879477.

774978055542 is a `hidden beast` number, since 7 + 7 + 4 + 9 + 7 + 80 + 5 + 5 + 542 = 666.

774978055542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 774978055542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7175722683 + ... + 7175722790.

It is an arithmetic number, because the mean of its divisors is an integer number (107635841055).

Almost surely, 2^774978055542 is an apocalyptic number.

774978055542 is an abundant number, since it is smaller than the sum of its proper divisors (947195401338).

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

774978055542 is a wasteful number, since it uses less digits than its factorization.

774978055542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14351445484 (or 14351445478 counting only the distinct ones).

The product of its (nonzero) digits is 98784000, while the sum is 63.

The spelling of 774978055542 in words is "seven hundred seventy-four billion, nine hundred seventy-eight million, fifty-five thousand, five hundred forty-two".