1946388536778 has 16 divisors (see below), whose sum is σ = 4448888084160. Its totient is φ = 556111010496.

The previous prime is 1946388536767. The next prime is 1946388536801. The reversal of 1946388536778 is 8776358836491.

It is a super-2 number, since 2×1946388536778² (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, 23171292063 + ... + 23171292146.

It is an arithmetic number, because the mean of its divisors is an integer number (278055505260).

Almost surely, 2^{1946388536778} is an apocalyptic number.

1946388536778 is an abundant number, since it is smaller than the sum of its proper divisors (2502499547382).

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

1946388536778 is a wasteful number, since it uses less digits than its factorization.

1946388536778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46342584221.

The product of its digits is 1463132160, while the sum is 75.

The spelling of 1946388536778 in words is "one trillion, nine hundred forty-six billion, three hundred eighty-eight million, five hundred thirty-six thousand, seven hundred seventy-eight".