145677553 has 4 divisors (see below), whose sum is σ = 166488640. Its totient is φ = 124866468.

The previous prime is 145677523. The next prime is 145677557. The reversal of 145677553 is 355776541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145677553 - 2⁹ = 145677041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145677557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10405533 + ... + 10405546.

It is an arithmetic number, because the mean of its divisors is an integer number (41622160).

Almost surely, 2^145677553 is an apocalyptic number.

It is an amenable number.

145677553 is a deficient number, since it is larger than the sum of its proper divisors (20811087).

145677553 is an equidigital number, since it uses as much as digits as its factorization.

145677553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20811086.

The product of its digits is 441000, while the sum is 43.

The square root of 145677553 is about 12069.6956465356. The cubic root of 145677553 is about 526.1758112006.

The spelling of 145677553 in words is "one hundred forty-five million, six hundred seventy-seven thousand, five hundred fifty-three".