145055661 has 8 divisors (see below), whose sum is σ = 194179104. Its totient is φ = 96318000.

The previous prime is 145055657. The next prime is 145055681. The reversal of 145055661 is 166550541.

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

It is not a de Polignac number, because 145055661 - 2² = 145055657 is a prime.

It is a super-2 number, since 2×145055661² = 42082289576293842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145055681) 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, 95566 + ... + 97071.

It is an arithmetic number, because the mean of its divisors is an integer number (24272388).

Almost surely, 2^145055661 is an apocalyptic number.

It is an amenable number.

145055661 is a deficient number, since it is larger than the sum of its proper divisors (49123443).

145055661 is a wasteful number, since it uses less digits than its factorization.

145055661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192891.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 145055661 is about 12043.9055542627. The cubic root of 145055661 is about 525.4260016276.

The spelling of 145055661 in words is "one hundred forty-five million, fifty-five thousand, six hundred sixty-one".