421363555642 has 4 divisors (see below), whose sum is σ = 632045333466. Its totient is φ = 210681777820.

The previous prime is 421363555603. The next prime is 421363555643. The reversal of 421363555642 is 246555363124.

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

It can be written as a sum of positive squares in only one way, i.e., 375181975441 + 46181580201 = 612521^2 + 214899^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421363555592 and 421363555601.

It is not an unprimeable number, because it can be changed into a prime (421363555643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105340888909 + ... + 105340888912.

Almost surely, 2^421363555642 is an apocalyptic number.

421363555642 is a deficient number, since it is larger than the sum of its proper divisors (210681777824).

421363555642 is a wasteful number, since it uses less digits than its factorization.

421363555642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210681777823.

The product of its digits is 2592000, while the sum is 46.

The spelling of 421363555642 in words is "four hundred twenty-one billion, three hundred sixty-three million, five hundred fifty-five thousand, six hundred forty-two".