1145552051261 has 4 divisors (see below), whose sum is σ = 1145620668000. Its totient is φ = 1145483434524.

The previous prime is 1145552051177. The next prime is 1145552051299. The reversal of 1145552051261 is 1621502555411.

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 1145552051261 - 2¹⁴ = 1145552034877 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 (1145552059261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34283321 + ... + 34316718.

It is an arithmetic number, because the mean of its divisors is an integer number (286405167000).

Almost surely, 2^{1145552051261} is an apocalyptic number.

It is an amenable number.

1145552051261 is a deficient number, since it is larger than the sum of its proper divisors (68616739).

1145552051261 is an equidigital number, since it uses as much as digits as its factorization.

1145552051261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68616738.

The product of its (nonzero) digits is 60000, while the sum is 38.

The spelling of 1145552051261 in words is "one trillion, one hundred forty-five billion, five hundred fifty-two million, fifty-one thousand, two hundred sixty-one".