145621402226 has 4 divisors (see below), whose sum is σ = 218432103342. Its totient is φ = 72810701112.

The previous prime is 145621402219. The next prime is 145621402243. The reversal of 145621402226 is 622204126541.

145621402226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141771075625 + 3850326601 = 376525^2 + 62051^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36405350555 + ... + 36405350558.

Almost surely, 2^145621402226 is an apocalyptic number.

145621402226 is a deficient number, since it is larger than the sum of its proper divisors (72810701116).

145621402226 is an equidigital number, since it uses as much as digits as its factorization.

145621402226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72810701115.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 145621402226 its reverse (622204126541), we get a palindrome (767825528767).

The spelling of 145621402226 in words is "one hundred forty-five billion, six hundred twenty-one million, four hundred two thousand, two hundred twenty-six".