1154210012555 has 4 divisors (see below), whose sum is σ = 1385052015072. Its totient is φ = 923368010040.

The previous prime is 1154210012491. The next prime is 1154210012573. The reversal of 1154210012555 is 5552100124511.

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

It is not a de Polignac number, because 1154210012555 - 2⁶ = 1154210012491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115421001251 + ... + 115421001260.

It is an arithmetic number, because the mean of its divisors is an integer number (346263003768).

Almost surely, 2^{1154210012555} is an apocalyptic number.

1154210012555 is a deficient number, since it is larger than the sum of its proper divisors (230842002517).

1154210012555 is an equidigital number, since it uses as much as digits as its factorization.

1154210012555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230842002516.

The product of its (nonzero) digits is 10000, while the sum is 32.

The spelling of 1154210012555 in words is "one trillion, one hundred fifty-four billion, two hundred ten million, twelve thousand, five hundred fifty-five".