145421561405266 has 8 divisors (see below), whose sum is σ = 218132882967564. Its totient is φ = 72710600416080.

The previous prime is 145421561405203. The next prime is 145421561405287. The reversal of 145421561405266 is 662504165124541.

It can be written as a sum of positive squares in 2 ways, for example, as 144122930224641 + 1298631180625 = 12005121^2 + 1139575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×145421561405266² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89132745 + ... + 90749596.

Almost surely, 2^{145421561405266} is an apocalyptic number.

145421561405266 is a deficient number, since it is larger than the sum of its proper divisors (72711321562298).

145421561405266 is a wasteful number, since it uses less digits than its factorization.

145421561405266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180286556.

The product of its (nonzero) digits is 6912000, while the sum is 52.

The spelling of 145421561405266 in words is "one hundred forty-five trillion, four hundred twenty-one billion, five hundred sixty-one million, four hundred five thousand, two hundred sixty-six".