1175420955551 has 4 divisors (see below), whose sum is σ = 1226526214512. Its totient is φ = 1124315696592.

The previous prime is 1175420955539. The next prime is 1175420955559. The reversal of 1175420955551 is 1555590245711.

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

It is a cyclic number.

It is not a de Polignac number, because 1175420955551 - 2³⁸ = 900543048607 is a prime.

It is a super-2 number, since 2×1175420955551² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1175420955551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1175420955559) 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, 25552629446 + ... + 25552629491.

It is an arithmetic number, because the mean of its divisors is an integer number (306631553628).

Almost surely, 2^{1175420955551} is an apocalyptic number.

1175420955551 is a deficient number, since it is larger than the sum of its proper divisors (51105258961).

1175420955551 is an equidigital number, since it uses as much as digits as its factorization.

1175420955551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51105258960.

The product of its (nonzero) digits is 1575000, while the sum is 50.

The spelling of 1175420955551 in words is "one trillion, one hundred seventy-five billion, four hundred twenty million, nine hundred fifty-five thousand, five hundred fifty-one".