145882999621 has 2 divisors, whose sum is σ = 145882999622. Its totient is φ = 145882999620.

The previous prime is 145882999607. The next prime is 145882999643. The reversal of 145882999621 is 126999288541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98003433025 + 47879566596 = 313055^2 + 218814^2 .

It is a cyclic number.

It is not a de Polignac number, because 145882999621 - 2²³ = 145874611013 is a prime.

It is a super-2 number, since 2×145882999621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145882999651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72941499810 + 72941499811.

It is an arithmetic number, because the mean of its divisors is an integer number (72941499811).

Almost surely, 2^145882999621 is an apocalyptic number.

It is an amenable number.

145882999621 is a deficient number, since it is larger than the sum of its proper divisors (1).

145882999621 is an equidigital number, since it uses as much as digits as its factorization.

145882999621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 64.

The spelling of 145882999621 in words is "one hundred forty-five billion, eight hundred eighty-two million, nine hundred ninety-nine thousand, six hundred twenty-one".