642453552 has 160 divisors (see below), whose sum is σ = 2002649600. Its totient is φ = 196017408.

The previous prime is 642453541. The next prime is 642453571. The reversal of 642453552 is 255354246.

642453552 is a `hidden beast` number, since 64 + 2 + 45 + 3 + 552 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 780213 + ... + 781035.

It is an arithmetic number, because the mean of its divisors is an integer number (12516560).

Almost surely, 2^642453552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642453552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001324800).

642453552 is an abundant number, since it is smaller than the sum of its proper divisors (1360196048).

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

642453552 is a wasteful number, since it uses less digits than its factorization.

642453552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 980 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The square root of 642453552 is about 25346.6674732597. The cubic root of 642453552 is about 862.8737253742.

The spelling of 642453552 in words is "six hundred forty-two million, four hundred fifty-three thousand, five hundred fifty-two".