145855191637 has 2 divisors, whose sum is σ = 145855191638. Its totient is φ = 145855191636.

The previous prime is 145855191617. The next prime is 145855191739. The reversal of 145855191637 is 736191558541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78843585681 + 67011605956 = 280791^2 + 258866^2 .

It is a cyclic number.

It is not a de Polignac number, because 145855191637 - 2²³ = 145846803029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145855191607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72927595818 + 72927595819.

It is an arithmetic number, because the mean of its divisors is an integer number (72927595819).

Almost surely, 2^145855191637 is an apocalyptic number.

It is an amenable number.

145855191637 is a deficient number, since it is larger than the sum of its proper divisors (1).

145855191637 is an equidigital number, since it uses as much as digits as its factorization.

145855191637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 55.

The spelling of 145855191637 in words is "one hundred forty-five billion, eight hundred fifty-five million, one hundred ninety-one thousand, six hundred thirty-seven".