1223612642540 has 48 divisors (see below), whose sum is σ = 2593778695200. Its totient is φ = 484839171072.

The previous prime is 1223612642503. The next prime is 1223612642561. The reversal of 1223612642540 is 452462163221.

It is a junction number, because it is equal to n+sod(n) for n = 1223612642494 and 1223612642503.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9389951 + ... + 9519369.

It is an arithmetic number, because the mean of its divisors is an integer number (54037056150).

Almost surely, 2^{1223612642540} is an apocalyptic number.

1223612642540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223612642540 is an abundant number, since it is smaller than the sum of its proper divisors (1370166052660).

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

1223612642540 is a wasteful number, since it uses less digits than its factorization.

1223612642540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133874 (or 133872 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 1223612642540 in words is "one trillion, two hundred twenty-three billion, six hundred twelve million, six hundred forty-two thousand, five hundred forty".