1055785387778 has 16 divisors (see below), whose sum is σ = 1787222914560. Its totient is φ = 463354088400.

The previous prime is 1055785387747. The next prime is 1055785387793. The reversal of 1055785387778 is 8777835875501.

1055785387778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1055785387778² (a number of 25 digits) contains 22 as substring.

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, 827417378 + ... + 827418653.

It is an arithmetic number, because the mean of its divisors is an integer number (111701432160).

Almost surely, 2^{1055785387778} is an apocalyptic number.

1055785387778 is a deficient number, since it is larger than the sum of its proper divisors (731437526782).

1055785387778 is a wasteful number, since it uses less digits than its factorization.

1055785387778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654836073.

The product of its (nonzero) digits is 460992000, while the sum is 71.

The spelling of 1055785387778 in words is "one trillion, fifty-five billion, seven hundred eighty-five million, three hundred eighty-seven thousand, seven hundred seventy-eight".