1642451220432 has 120 divisors (see below), whose sum is σ = 5025332920608. Its totient is φ = 496632633600.

The previous prime is 1642451220419. The next prime is 1642451220439. The reversal of 1642451220432 is 2340221542461.

1642451220432 is a `hidden beast` number, since 1 + 6 + 424 + 5 + 1 + 220 + 4 + 3 + 2 = 666.

It is a super-2 number, since 2×1642451220432² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642451220439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 394398 + ... + 1854845.

Almost surely, 2^{1642451220432} is an apocalyptic number.

1642451220432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1642451220432 is an abundant number, since it is smaller than the sum of its proper divisors (3382881700176).

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

1642451220432 is a wasteful number, since it uses less digits than its factorization.

1642451220432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249729 (or 2249720 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 1642451220432 its reverse (2340221542461), we get a palindrome (3982672762893).

The spelling of 1642451220432 in words is "one trillion, six hundred forty-two billion, four hundred fifty-one million, two hundred twenty thousand, four hundred thirty-two".