145509355940 has 24 divisors (see below), whose sum is σ = 329075005560. Its totient is φ = 53726531328.

The previous prime is 145509355931. The next prime is 145509355967. The reversal of 145509355940 is 49553905541.

It can be written as a sum of positive squares in 4 ways, for example, as 5070294436 + 140439061504 = 71206^2 + 374752^2 .

It is a super-2 number, since 2×145509355940² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279825425 + ... + 279825944.

It is an arithmetic number, because the mean of its divisors is an integer number (13711458565).

Almost surely, 2^145509355940 is an apocalyptic number.

145509355940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145509355940 is an abundant number, since it is smaller than the sum of its proper divisors (183565649620).

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

145509355940 is a wasteful number, since it uses less digits than its factorization.

145509355940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559651391 (or 559651389 counting only the distinct ones).

The product of its (nonzero) digits is 2430000, while the sum is 50.

The spelling of 145509355940 in words is "one hundred forty-five billion, five hundred nine million, three hundred fifty-five thousand, nine hundred forty".