19651425346450 has 48 divisors (see below), whose sum is σ = 40738682423520. Its totient is φ = 7008805566720.

The previous prime is 19651425346363. The next prime is 19651425346463. The reversal of 19651425346450 is 5464352415691.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19651425346391 and 19651425346400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 608387112 + ... + 608419411.

It is an arithmetic number, because the mean of its divisors is an integer number (848722550490).

Almost surely, 2^{19651425346450} is an apocalyptic number.

19651425346450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19651425346450 is an abundant number, since it is smaller than the sum of its proper divisors (21087257077070).

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

19651425346450 is a wasteful number, since it uses less digits than its factorization.

19651425346450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216806571 (or 1216806566 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 19651425346450 in words is "nineteen trillion, six hundred fifty-one billion, four hundred twenty-five million, three hundred forty-six thousand, four hundred fifty".