1281641883977 has 32 divisors (see below), whose sum is σ = 1588427366400. Its totient is φ = 1006984496448.

The previous prime is 1281641883953. The next prime is 1281641883997. The reversal of 1281641883977 is 7793881461821.

It is not a de Polignac number, because 1281641883977 - 2⁸ = 1281641883721 is a prime.

It is a super-2 number, since 2×1281641883977² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1281641883917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7725818 + ... + 7889964.

It is an arithmetic number, because the mean of its divisors is an integer number (49638355200).

Almost surely, 2^{1281641883977} is an apocalyptic number.

It is an amenable number.

1281641883977 is a deficient number, since it is larger than the sum of its proper divisors (306785482423).

1281641883977 is a wasteful number, since it uses less digits than its factorization.

1281641883977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164765.

The product of its digits is 32514048, while the sum is 65.

The spelling of 1281641883977 in words is "one trillion, two hundred eighty-one billion, six hundred forty-one million, eight hundred eighty-three thousand, nine hundred seventy-seven".