145817087644 has 24 divisors (see below), whose sum is σ = 265878370800. Its totient is φ = 69888013440.

The previous prime is 145817087639. The next prime is 145817087693. The reversal of 145817087644 is 446780718541.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4505617 + ... + 4537864.

It is an arithmetic number, because the mean of its divisors is an integer number (11078265450).

Almost surely, 2^145817087644 is an apocalyptic number.

It is an amenable number.

145817087644 is a deficient number, since it is larger than the sum of its proper divisors (120061283156).

145817087644 is a wasteful number, since it uses less digits than its factorization.

145817087644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043653 (or 9043651 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 55.

It can be divided in two parts, 14581 and 7087644, that added together give a square (7102225 = 2665²).

The spelling of 145817087644 in words is "one hundred forty-five billion, eight hundred seventeen million, eighty-seven thousand, six hundred forty-four".