611154420023 has 4 divisors (see below), whose sum is σ = 698462194320. Its totient is φ = 523846645728.

The previous prime is 611154420011. The next prime is 611154420131. The reversal of 611154420023 is 320024451116.

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

It is not a de Polignac number, because 611154420023 - 2²⁰ = 611153371447 is a prime.

It is a super-2 number, since 2×611154420023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611154420823) 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, 43653887138 + ... + 43653887151.

It is an arithmetic number, because the mean of its divisors is an integer number (174615548580).

Almost surely, 2^611154420023 is an apocalyptic number.

611154420023 is a deficient number, since it is larger than the sum of its proper divisors (87307774297).

611154420023 is an equidigital number, since it uses as much as digits as its factorization.

611154420023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87307774296.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 611154420023 its reverse (320024451116), we get a palindrome (931178871139).

The spelling of 611154420023 in words is "six hundred eleven billion, one hundred fifty-four million, four hundred twenty thousand, twenty-three".