145564406644 has 6 divisors (see below), whose sum is σ = 254737711634. Its totient is φ = 72782203320.

The previous prime is 145564406627. The next prime is 145564406677. The reversal of 145564406644 is 446604465541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 145122902500 + 441504144 = 380950^2 + 21012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18195550827 + ... + 18195550834.

Almost surely, 2^145564406644 is an apocalyptic number.

It is an amenable number.

145564406644 is a deficient number, since it is larger than the sum of its proper divisors (109173304990).

145564406644 is a wasteful number, since it uses less digits than its factorization.

145564406644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36391101665 (or 36391101663 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 49.

The spelling of 145564406644 in words is "one hundred forty-five billion, five hundred sixty-four million, four hundred six thousand, six hundred forty-four".