4251425621646 has 32 divisors (see below), whose sum is σ = 9722147770368. Its totient is φ = 1214117598240.

The previous prime is 4251425621629. The next prime is 4251425621647. The reversal of 4251425621646 is 6461265241524.

It is a junction number, because it is equal to n+sod(n) for n = 4251425621595 and 4251425621604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251425621647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23886805 + ... + 24064128.

It is an arithmetic number, because the mean of its divisors is an integer number (303817117824).

Almost surely, 2^{4251425621646} is an apocalyptic number.

4251425621646 is an abundant number, since it is smaller than the sum of its proper divisors (5470722148722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4251425621646 is a wasteful number, since it uses less digits than its factorization.

4251425621646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47953056.

The product of its digits is 2764800, while the sum is 48.

The spelling of 4251425621646 in words is "four trillion, two hundred fifty-one billion, four hundred twenty-five million, six hundred twenty-one thousand, six hundred forty-six".