425020400551 has 4 divisors (see below), whose sum is σ = 425553676632. Its totient is φ = 424487124472.

The previous prime is 425020400537. The next prime is 425020400569. The reversal of 425020400551 is 155004020524.

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 425020400551 - 2⁹ = 425020400039 is a prime.

It is a super-2 number, since 2×425020400551² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425020400501) 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, 266636845 + ... + 266638438.

It is an arithmetic number, because the mean of its divisors is an integer number (106388419158).

Almost surely, 2^425020400551 is an apocalyptic number.

425020400551 is a deficient number, since it is larger than the sum of its proper divisors (533276081).

425020400551 is an equidigital number, since it uses as much as digits as its factorization.

425020400551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533276080.

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 425020400551 in words is "four hundred twenty-five billion, twenty million, four hundred thousand, five hundred fifty-one".