1977146118 has 64 divisors (see below), whose sum is σ = 4640256000. Its totient is φ = 622289952.

The previous prime is 1977146057. The next prime is 1977146123. The reversal of 1977146118 is 8116417791.

1977146118 is a `hidden beast` number, since 19 + 7 + 7 + 14 + 611 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322203 + ... + 328281.

It is an arithmetic number, because the mean of its divisors is an integer number (72504000).

Almost surely, 2^1977146118 is an apocalyptic number.

1977146118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977146118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2320128000).

1977146118 is an abundant number, since it is smaller than the sum of its proper divisors (2663109882).

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

1977146118 is a wasteful number, since it uses less digits than its factorization.

1977146118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426 (or 6420 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The square root of 1977146118 is about 44465.1112446601. Note that the first 3 decimals coincide. The cubic root of 1977146118 is about 1255.1036391081.

The spelling of 1977146118 in words is "one billion, nine hundred seventy-seven million, one hundred forty-six thousand, one hundred eighteen".