145564623666 has 256 divisors, whose sum is σ = 421013053440. Its totient is φ = 36181728000.

The previous prime is 145564623647. The next prime is 145564623671. The reversal of 145564623666 is 666326465541.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9376851 + ... + 9392361.

It is an arithmetic number, because the mean of its divisors is an integer number (1644582240).

Almost surely, 2^145564623666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145564623666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210506526720).

145564623666 is an abundant number, since it is smaller than the sum of its proper divisors (275448429774).

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

145564623666 is a wasteful number, since it uses less digits than its factorization.

145564623666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15638 (or 15632 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 54.

The spelling of 145564623666 in words is "one hundred forty-five billion, five hundred sixty-four million, six hundred twenty-three thousand, six hundred sixty-six".