145131635501 has 4 divisors (see below), whose sum is σ = 145132479900. Its totient is φ = 145130791104.

The previous prime is 145131635497. The next prime is 145131635503. The reversal of 145131635501 is 105536131541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 105536131541 = 19 ⋅5554533239.

It can be written as a sum of positive squares in 2 ways, for example, as 27858948100 + 117272687401 = 166910^2 + 342451^2 .

It is a cyclic number.

It is not a de Polignac number, because 145131635501 - 2² = 145131635497 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 (145131635503) 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, 61886 + ... + 542303.

It is an arithmetic number, because the mean of its divisors is an integer number (36283119975).

Almost surely, 2^145131635501 is an apocalyptic number.

It is an amenable number.

145131635501 is a deficient number, since it is larger than the sum of its proper divisors (844399).

145131635501 is an equidigital number, since it uses as much as digits as its factorization.

145131635501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844398.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 145131635501 in words is "one hundred forty-five billion, one hundred thirty-one million, six hundred thirty-five thousand, five hundred one".