145000121550405 has 64 divisors (see below), whose sum is σ = 259961751053568. Its totient is φ = 68395024373760.

The previous prime is 145000121550329. The next prime is 145000121550481. The reversal of 145000121550405 is 504055121000541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145000121550329) and next prime (145000121550481).

It is not a de Polignac number, because 145000121550405 - 2³³ = 144991531615813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51103329 + ... + 53866041.

It is an arithmetic number, because the mean of its divisors is an integer number (4061902360212).

Almost surely, 2^{145000121550405} is an apocalyptic number.

145000121550405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145000121550405 is a deficient number, since it is larger than the sum of its proper divisors (114961629503163).

145000121550405 is a wasteful number, since it uses less digits than its factorization.

145000121550405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771366.

The product of its (nonzero) digits is 20000, while the sum is 33.

Adding to 145000121550405 its reverse (504055121000541), we get a palindrome (649055242550946).

The spelling of 145000121550405 in words is "one hundred forty-five trillion, one hundred twenty-one million, five hundred fifty thousand, four hundred five".