123455670511 has 32 divisors (see below), whose sum is σ = 134233908480. Its totient is φ = 113179680000.

The previous prime is 123455670509. The next prime is 123455670557. The reversal of 123455670511 is 115076554321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123455670511 - 2¹ = 123455670509 is a prime.

It is a super-2 number, since 2×123455670511² (a number of 23 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 (123455670011) 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 31 ways as a sum of consecutive naturals, for example, 24142891 + ... + 24148003.

It is an arithmetic number, because the mean of its divisors is an integer number (4194809640).

Almost surely, 2^123455670511 is an apocalyptic number.

123455670511 is a deficient number, since it is larger than the sum of its proper divisors (10778237969).

123455670511 is a wasteful number, since it uses less digits than its factorization.

123455670511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 123455670511 in words is "one hundred twenty-three billion, four hundred fifty-five million, six hundred seventy thousand, five hundred eleven".