1129957087649 has 4 divisors (see below), whose sum is σ = 1216876863636. Its totient is φ = 1043037311664.

The previous prime is 1129957087631. The next prime is 1129957087657. The reversal of 1129957087649 is 9467807599211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 777112771600 + 352844316049 = 881540^2 + 594007^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129957087649 - 2³² = 1125662120353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129957087619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43459887974 + ... + 43459887999.

It is an arithmetic number, because the mean of its divisors is an integer number (304219215909).

Almost surely, 2^{1129957087649} is an apocalyptic number.

It is an amenable number.

1129957087649 is a deficient number, since it is larger than the sum of its proper divisors (86919775987).

1129957087649 is an equidigital number, since it uses as much as digits as its factorization.

1129957087649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86919775986.

The product of its (nonzero) digits is 68584320, while the sum is 68.

The spelling of 1129957087649 in words is "one trillion, one hundred twenty-nine billion, nine hundred fifty-seven million, eighty-seven thousand, six hundred forty-nine".