145405661442 has 8 divisors (see below), whose sum is σ = 290811322896. Its totient is φ = 48468553812.

The previous prime is 145405661413. The next prime is 145405661501. The reversal of 145405661442 is 244166504541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

145405661442 is an admirable number.

It is a super-2 number, since 2×145405661442² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145405661394 and 145405661403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12117138448 + ... + 12117138459.

It is an arithmetic number, because the mean of its divisors is an integer number (36351415362).

Almost surely, 2^145405661442 is an apocalyptic number.

145405661442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

145405661442 is a wasteful number, since it uses less digits than its factorization.

145405661442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24234276912.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 145405661442 in words is "one hundred forty-five billion, four hundred five million, six hundred sixty-one thousand, four hundred forty-two".