144997764767 has 8 divisors (see below), whose sum is σ = 151453979040. Its totient is φ = 138638636640.

The previous prime is 144997764731. The next prime is 144997764827. The reversal of 144997764767 is 767467799441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144997764767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144997764767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144990764767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24268484 + ... + 24274457.

It is an arithmetic number, because the mean of its divisors is an integer number (18931747380).

Almost surely, 2^144997764767 is an apocalyptic number.

144997764767 is a deficient number, since it is larger than the sum of its proper divisors (6456214273).

144997764767 is a wasteful number, since it uses less digits than its factorization.

144997764767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48543073.

The product of its digits is 448084224, while the sum is 71.

The spelling of 144997764767 in words is "one hundred forty-four billion, nine hundred ninety-seven million, seven hundred sixty-four thousand, seven hundred sixty-seven".