123513619240 has 64 divisors (see below), whose sum is σ = 307439867520. Its totient is φ = 44281440000.

The previous prime is 123513619231. The next prime is 123513619249. The reversal of 123513619240 is 42916315321.

It is an interprime number because it is at equal distance from previous prime (123513619231) and next prime (123513619249).

It is a super-2 number, since 2×123513619240² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123513619240.

It is not an unprimeable number, because it can be changed into a prime (123513619249) 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 15 ways as a sum of consecutive naturals, for example, 1945611 + ... + 2008090.

It is an arithmetic number, because the mean of its divisors is an integer number (4803747930).

Almost surely, 2^123513619240 is an apocalyptic number.

123513619240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123513619240 is an abundant number, since it is smaller than the sum of its proper divisors (183926248280).

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

123513619240 is a wasteful number, since it uses less digits than its factorization.

123513619240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953794 (or 3953790 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 123513619240 in words is "one hundred twenty-three billion, five hundred thirteen million, six hundred nineteen thousand, two hundred forty".