145457777 has 8 divisors (see below), whose sum is σ = 149760864. Its totient is φ = 141196608.

The previous prime is 145457743. The next prime is 145457779. The reversal of 145457777 is 777754541.

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

It is a cyclic number.

It is not a de Polignac number, because 145457777 - 2⁶ = 145457713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145457779) 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, 3368 + ... + 17385.

It is an arithmetic number, because the mean of its divisors is an integer number (18720108).

Almost surely, 2^145457777 is an apocalyptic number.

It is an amenable number.

145457777 is a deficient number, since it is larger than the sum of its proper divisors (4303087).

145457777 is a wasteful number, since it uses less digits than its factorization.

145457777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20959.

The product of its digits is 960400, while the sum is 47.

The square root of 145457777 is about 12060.5877551635. The cubic root of 145457777 is about 525.9110735084.

It can be divided in two parts, 14545 and 7777, that added together give a palindrome (22322).

The spelling of 145457777 in words is "one hundred forty-five million, four hundred fifty-seven thousand, seven hundred seventy-seven".