145302511644 has 36 divisors (see below), whose sum is σ = 379957719960. Its totient is φ = 46764026400.

The previous prime is 145302511591. The next prime is 145302511667. The reversal of 145302511644 is 446115203541.

145302511644 is a `hidden beast` number, since 1 + 4 + 5 + 3 + 0 + 2 + 5 + 1 + 1 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×145302511644² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 145302511599 and 145302511608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69588282 + ... + 69590369.

It is an arithmetic number, because the mean of its divisors is an integer number (10554381110).

Almost surely, 2^145302511644 is an apocalyptic number.

It is an amenable number.

145302511644 is an abundant number, since it is smaller than the sum of its proper divisors (234655208316).

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

145302511644 is a wasteful number, since it uses less digits than its factorization.

145302511644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139178690 (or 139178685 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 145302511644 in words is "one hundred forty-five billion, three hundred two million, five hundred eleven thousand, six hundred forty-four".