426521165243501 has 4 divisors (see below), whose sum is σ = 426521275907904. Its totient is φ = 426521054579100.

The previous prime is 426521165243443. The next prime is 426521165243513. The reversal of 426521165243501 is 105342561125624.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 426521165243501 - 2¹⁴ = 426521165227117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426521165243401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49334195 + ... + 57331536.

It is an arithmetic number, because the mean of its divisors is an integer number (106630318976976).

Almost surely, 2^{426521165243501} is an apocalyptic number.

It is an amenable number.

426521165243501 is a deficient number, since it is larger than the sum of its proper divisors (110664403).

426521165243501 is a wasteful number, since it uses less digits than its factorization.

426521165243501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110664402.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 426521165243501 in words is "four hundred twenty-six trillion, five hundred twenty-one billion, one hundred sixty-five million, two hundred forty-three thousand, five hundred one".