145626501421 has 2 divisors, whose sum is σ = 145626501422. Its totient is φ = 145626501420.

The previous prime is 145626501409. The next prime is 145626501431. The reversal of 145626501421 is 124105626541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107606961225 + 38019540196 = 328035^2 + 194986^2 .

It is a cyclic number.

It is not a de Polignac number, because 145626501421 - 2²⁹ = 145089630509 is a prime.

It is a super-2 number, since 2×145626501421² (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 (145626501431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72813250710 + 72813250711.

It is an arithmetic number, because the mean of its divisors is an integer number (72813250711).

Almost surely, 2^145626501421 is an apocalyptic number.

It is an amenable number.

145626501421 is a deficient number, since it is larger than the sum of its proper divisors (1).

145626501421 is an equidigital number, since it uses as much as digits as its factorization.

145626501421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 145626501421 in words is "one hundred forty-five billion, six hundred twenty-six million, five hundred one thousand, four hundred twenty-one".