123154123145 has 32 divisors (see below), whose sum is σ = 165567732480. Its totient is φ = 87392010240.

The previous prime is 123154123117. The next prime is 123154123151. The reversal of 123154123145 is 541321451321.

It is not a de Polignac number, because 123154123145 - 2¹⁰ = 123154122121 is a prime.

It is a super-2 number, since 2×123154123145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114140 + ... + 509250.

It is an arithmetic number, because the mean of its divisors is an integer number (5173991640).

Almost surely, 2^123154123145 is an apocalyptic number.

It is an amenable number.

123154123145 is a deficient number, since it is larger than the sum of its proper divisors (42413609335).

123154123145 is a wasteful number, since it uses less digits than its factorization.

123154123145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395345.

The product of its digits is 14400, while the sum is 32.

Adding to 123154123145 its reverse (541321451321), we get a palindrome (664475574466).

The spelling of 123154123145 in words is "one hundred twenty-three billion, one hundred fifty-four million, one hundred twenty-three thousand, one hundred forty-five".