145405515552 has 48 divisors (see below), whose sum is σ = 416388524832. Its totient is φ = 44062277120.

The previous prime is 145405515547. The next prime is 145405515553. The reversal of 145405515552 is 255515504541.

It is a happy number.

145405515552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×145405515552² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145405515553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68846253 + ... + 68848364.

It is an arithmetic number, because the mean of its divisors is an integer number (8674760934).

Almost surely, 2^145405515552 is an apocalyptic number.

145405515552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145405515552 is an abundant number, since it is smaller than the sum of its proper divisors (270983009280).

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

145405515552 is a wasteful number, since it uses less digits than its factorization.

145405515552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137694641 (or 137694633 counting only the distinct ones).

The product of its (nonzero) digits is 500000, while the sum is 42.

The spelling of 145405515552 in words is "one hundred forty-five billion, four hundred five million, five hundred fifteen thousand, five hundred fifty-two".