145556331515611 has 4 divisors (see below), whose sum is σ = 145574250559992. Its totient is φ = 145538412471232.

The previous prime is 145556331515587. The next prime is 145556331515627. The reversal of 145556331515611 is 116515133655541.

It is a happy number.

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 145556331515611 - 2²⁷ = 145556197297883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145556331515671) 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, 8959510006 + ... + 8959526251.

It is an arithmetic number, because the mean of its divisors is an integer number (36393562639998).

Almost surely, 2^{145556331515611} is an apocalyptic number.

145556331515611 is a deficient number, since it is larger than the sum of its proper divisors (17919044381).

145556331515611 is an equidigital number, since it uses as much as digits as its factorization.

145556331515611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17919044380.

The product of its digits is 4050000, while the sum is 52.

The spelling of 145556331515611 in words is "one hundred forty-five trillion, five hundred fifty-six billion, three hundred thirty-one million, five hundred fifteen thousand, six hundred eleven".