123455046551440 has 40 divisors (see below), whose sum is σ = 289293085486080. Its totient is φ = 48993183824256.

The previous prime is 123455046551411. The next prime is 123455046551449. The reversal of 123455046551440 is 44155640554321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×123455046551440² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123455046551449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6075533470 + ... + 6075553789.

It is an arithmetic number, because the mean of its divisors is an integer number (7232327137152).

Almost surely, 2^{123455046551440} is an apocalyptic number.

123455046551440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123455046551440 is an abundant number, since it is smaller than the sum of its proper divisors (165838038934640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123455046551440 is a wasteful number, since it uses less digits than its factorization.

123455046551440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12151087399 (or 12151087393 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 49.

The spelling of 123455046551440 in words is "one hundred twenty-three trillion, four hundred fifty-five billion, forty-six million, five hundred fifty-one thousand, four hundred forty".