1677856981900 has 72 divisors (see below), whose sum is σ = 3988564715520. Its totient is φ = 607576872000.

The previous prime is 1677856981817. The next prime is 1677856982017. The reversal of 1677856981900 is 91896587761.

It is a happy number.

It is a super-2 number, since 2×1677856981900² (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 23 ways as a sum of consecutive naturals, for example, 2928156 + ... + 3453955.

It is an arithmetic number, because the mean of its divisors is an integer number (55396732160).

Almost surely, 2^{1677856981900} is an apocalyptic number.

1677856981900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1677856981900 is an abundant number, since it is smaller than the sum of its proper divisors (2310707733620).

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

1677856981900 is a wasteful number, since it uses less digits than its factorization.

1677856981900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382375 (or 6382368 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 1677856981900 in words is "one trillion, six hundred seventy-seven billion, eight hundred fifty-six million, nine hundred eighty-one thousand, nine hundred".