1201277832557 has 4 divisors (see below), whose sum is σ = 1310484908256. Its totient is φ = 1092070756860.

The previous prime is 1201277832553. The next prime is 1201277832647. The reversal of 1201277832557 is 7552387721021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201277832557 - 2² = 1201277832553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201277832551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54603537833 + ... + 54603537854.

It is an arithmetic number, because the mean of its divisors is an integer number (327621227064).

Almost surely, 2^{1201277832557} is an apocalyptic number.

It is an amenable number.

1201277832557 is a deficient number, since it is larger than the sum of its proper divisors (109207075699).

1201277832557 is a wasteful number, since it uses less digits than its factorization.

1201277832557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109207075698.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 1201277832557 in words is "one trillion, two hundred one billion, two hundred seventy-seven million, eight hundred thirty-two thousand, five hundred fifty-seven".