425243155551 has 4 divisors (see below), whose sum is σ = 566990874072. Its totient is φ = 283495437032.

The previous prime is 425243155501. The next prime is 425243155553. The reversal of 425243155551 is 155551342524.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 425243155551 - 2¹⁹ = 425242631263 is a prime.

It is a super-2 number, since 2×425243155551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425243155553) 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, 70873859256 + ... + 70873859261.

It is an arithmetic number, because the mean of its divisors is an integer number (141747718518).

Almost surely, 2^425243155551 is an apocalyptic number.

425243155551 is a deficient number, since it is larger than the sum of its proper divisors (141747718521).

425243155551 is a wasteful number, since it uses less digits than its factorization.

425243155551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141747718520.

The product of its digits is 600000, while the sum is 42.

The spelling of 425243155551 in words is "four hundred twenty-five billion, two hundred forty-three million, one hundred fifty-five thousand, five hundred fifty-one".