421145545505 has 8 divisors (see below), whose sum is σ = 505404350952. Its totient is φ = 336896638848.

The previous prime is 421145545433. The next prime is 421145545529. The reversal of 421145545505 is 505545541124.

It can be written as a sum of positive squares in 4 ways, for example, as 103870199521 + 317275345984 = 322289^2 + 563272^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 421145545505 - 2¹⁴ = 421145529121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2380772 + ... + 2551541.

It is an arithmetic number, because the mean of its divisors is an integer number (63175543869).

Almost surely, 2^421145545505 is an apocalyptic number.

It is an amenable number.

421145545505 is a deficient number, since it is larger than the sum of its proper divisors (84258805447).

421145545505 is a wasteful number, since it uses less digits than its factorization.

421145545505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949395.

The product of its (nonzero) digits is 400000, while the sum is 41.

The spelling of 421145545505 in words is "four hundred twenty-one billion, one hundred forty-five million, five hundred forty-five thousand, five hundred five".