145209961287 has 12 divisors (see below), whose sum is σ = 209751281064. Its totient is φ = 96804998160.

The previous prime is 145209961283. The next prime is 145209961307. The reversal of 145209961287 is 782169902541.

It is a happy number.

145209961287 is a `hidden beast` number, since 1 + 4 + 520 + 9 + 96 + 1 + 28 + 7 = 666.

It is not a de Polignac number, because 145209961287 - 2² = 145209961283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145209961283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678712 + ... + 866642.

It is an arithmetic number, because the mean of its divisors is an integer number (17479273422).

Almost surely, 2^145209961287 is an apocalyptic number.

145209961287 is a deficient number, since it is larger than the sum of its proper divisors (64541319777).

145209961287 is a wasteful number, since it uses less digits than its factorization.

145209961287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273790 (or 273787 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 145209961287 in words is "one hundred forty-five billion, two hundred nine million, nine hundred sixty-one thousand, two hundred eighty-seven".