145356831553 has 2 divisors, whose sum is σ = 145356831554. Its totient is φ = 145356831552.

The previous prime is 145356831439. The next prime is 145356831577. The reversal of 145356831553 is 355138653541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117366537744 + 27990293809 = 342588^2 + 167303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145356831553 is a prime.

It is a super-2 number, since 2×145356831553² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145356831497 and 145356831506.

It is not a weakly prime, because it can be changed into another prime (145356838553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72678415776 + 72678415777.

It is an arithmetic number, because the mean of its divisors is an integer number (72678415777).

Almost surely, 2^145356831553 is an apocalyptic number.

It is an amenable number.

145356831553 is a deficient number, since it is larger than the sum of its proper divisors (1).

145356831553 is an equidigital number, since it uses as much as digits as its factorization.

145356831553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240000, while the sum is 49.

The spelling of 145356831553 in words is "one hundred forty-five billion, three hundred fifty-six million, eight hundred thirty-one thousand, five hundred fifty-three".