145187203851551 has 4 divisors (see below), whose sum is σ = 145188870209832. Its totient is φ = 145185537493272.

The previous prime is 145187203851493. The next prime is 145187203851607. The reversal of 145187203851551 is 155158302781541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145187203851551 - 2³⁴ = 145170023982367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145187203851251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833048441 + ... + 833222706.

It is an arithmetic number, because the mean of its divisors is an integer number (36297217552458).

Almost surely, 2^{145187203851551} is an apocalyptic number.

145187203851551 is a deficient number, since it is larger than the sum of its proper divisors (1666358281).

145187203851551 is an equidigital number, since it uses as much as digits as its factorization.

145187203851551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666358280.

The product of its (nonzero) digits is 6720000, while the sum is 56.

The spelling of 145187203851551 in words is "one hundred forty-five trillion, one hundred eighty-seven billion, two hundred three million, eight hundred fifty-one thousand, five hundred fifty-one".