12145611720 has 64 divisors (see below), whose sum is σ = 39749279040. Its totient is φ = 2944390400.

The previous prime is 12145611703. The next prime is 12145611727. The reversal of 12145611720 is 2711654121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (12145611727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4599291 + ... + 4601930.

It is an arithmetic number, because the mean of its divisors is an integer number (621082485).

Almost surely, 2^12145611720 is an apocalyptic number.

12145611720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12145611720 is an abundant number, since it is smaller than the sum of its proper divisors (27603667320).

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

12145611720 is a wasteful number, since it uses less digits than its factorization.

12145611720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9201246 (or 9201242 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 12145611720 in words is "twelve billion, one hundred forty-five million, six hundred eleven thousand, seven hundred twenty".