145445554431520 has 96 divisors (see below), whose sum is σ = 392917477107456. Its totient is φ = 49839811660800.

The previous prime is 145445554431511. The next prime is 145445554431599. The reversal of 145445554431520 is 25134455544541.

It is a super-2 number, since 2×145445554431520² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33411351 + ... + 37512790.

It is an arithmetic number, because the mean of its divisors is an integer number (4092890386536).

Almost surely, 2^{145445554431520} is an apocalyptic number.

145445554431520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145445554431520 is an abundant number, since it is smaller than the sum of its proper divisors (247471922675936).

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

145445554431520 is a wasteful number, since it uses less digits than its factorization.

145445554431520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70925994 (or 70925986 counting only the distinct ones).

The product of its (nonzero) digits is 19200000, while the sum is 52.

The spelling of 145445554431520 in words is "one hundred forty-five trillion, four hundred forty-five billion, five hundred fifty-four million, four hundred thirty-one thousand, five hundred twenty".