145431311355 has 128 divisors (see below), whose sum is σ = 304136985600. Its totient is φ = 65171174400.

The previous prime is 145431311351. The next prime is 145431311369. The reversal of 145431311355 is 553113134541.

145431311355 is a `hidden beast` number, since 145 + 431 + 31 + 1 + 3 + 55 = 666.

It is not a de Polignac number, because 145431311355 - 2² = 145431311351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145431311351) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1093957 + ... + 1219673.

It is an arithmetic number, because the mean of its divisors is an integer number (2376070200).

Almost surely, 2^145431311355 is an apocalyptic number.

145431311355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145431311355 is an abundant number, since it is smaller than the sum of its proper divisors (158705674245).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145431311355 is a wasteful number, since it uses less digits than its factorization.

145431311355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125802 (or 125796 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

Adding to 145431311355 its reverse (553113134541), we get a palindrome (698544445896).

The spelling of 145431311355 in words is "one hundred forty-five billion, four hundred thirty-one million, three hundred eleven thousand, three hundred fifty-five".