123152440551 has 64 divisors (see below), whose sum is σ = 197194383360. Its totient is φ = 66842392320.

The previous prime is 123152440531. The next prime is 123152440577. The reversal of 123152440551 is 155044251321.

It is not a de Polignac number, because 123152440551 - 2²⁷ = 123018222823 is a prime.

It is a super-2 number, since 2×123152440551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123152440531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48503040 + ... + 48505578.

It is an arithmetic number, because the mean of its divisors is an integer number (3081162240).

Almost surely, 2^123152440551 is an apocalyptic number.

123152440551 is a deficient number, since it is larger than the sum of its proper divisors (74041942809).

123152440551 is a wasteful number, since it uses less digits than its factorization.

123152440551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 123152440551 its reverse (155044251321), we get a palindrome (278196691872).

The spelling of 123152440551 in words is "one hundred twenty-three billion, one hundred fifty-two million, four hundred forty thousand, five hundred fifty-one".