145438718420 has 24 divisors (see below), whose sum is σ = 318700497024. Its totient is φ = 55646118176.

The previous prime is 145438718419. The next prime is 145438718437. The reversal of 145438718420 is 24817834541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158085104 + ... + 158086023.

It is an arithmetic number, because the mean of its divisors is an integer number (13279187376).

Almost surely, 2^145438718420 is an apocalyptic number.

145438718420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145438718420 is an abundant number, since it is smaller than the sum of its proper divisors (173261778604).

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

145438718420 is a wasteful number, since it uses less digits than its factorization.

145438718420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316171159 (or 316171157 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 145438718420 in words is "one hundred forty-five billion, four hundred thirty-eight million, seven hundred eighteen thousand, four hundred twenty".