144897672771 has 48 divisors (see below), whose sum is σ = 220099981920. Its totient is φ = 94194524160.

The previous prime is 144897672767. The next prime is 144897672793. The reversal of 144897672771 is 177276798441.

144897672771 is a `hidden beast` number, since 1 + 4 + 489 + 7 + 67 + 27 + 71 = 666.

It is not a de Polignac number, because 144897672771 - 2² = 144897672767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144897672699 and 144897672708.

It is not an unprimeable number, because it can be changed into a prime (144897672671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15607651 + ... + 15616931.

It is an arithmetic number, because the mean of its divisors is an integer number (4585416290).

Almost surely, 2^144897672771 is an apocalyptic number.

144897672771 is a deficient number, since it is larger than the sum of its proper divisors (75202309149).

144897672771 is an frugal number, since it uses more digits than its factorization.

144897672771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9541 (or 9446 counting only the distinct ones).

The product of its digits is 33191424, while the sum is 63.

The spelling of 144897672771 in words is "one hundred forty-four billion, eight hundred ninety-seven million, six hundred seventy-two thousand, seven hundred seventy-one".