1281158935432 has 8 divisors (see below), whose sum is σ = 2402173003950. Its totient is φ = 640579467712.

The previous prime is 1281158935429. The next prime is 1281158935447. The reversal of 1281158935432 is 2345398511821.

It can be written as a sum of positive squares in only one way, i.e., 1220083721476 + 61075213956 = 1104574^2 + 247134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1281158935432.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80072433457 + ... + 80072433472.

Almost surely, 2^{1281158935432} is an apocalyptic number.

It is an amenable number.

1281158935432 is a deficient number, since it is larger than the sum of its proper divisors (1121014068518).

1281158935432 is a wasteful number, since it uses less digits than its factorization.

1281158935432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160144866935 (or 160144866931 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 52.

The spelling of 1281158935432 in words is "one trillion, two hundred eighty-one billion, one hundred fifty-eight million, nine hundred thirty-five thousand, four hundred thirty-two".