1642555260 has 60 divisors (see below), whose sum is σ = 5152761768. Its totient is φ = 438014304.

The previous prime is 1642555241. The next prime is 1642555267. The reversal of 1642555260 is 625552461.

1642555260 is a `hidden beast` number, since 1 + 6 + 42 + 5 + 552 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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 (1642555267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 505342 + ... + 508581.

Almost surely, 2^1642555260 is an apocalyptic number.

1642555260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642555260 is an abundant number, since it is smaller than the sum of its proper divisors (3510206508).

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

1642555260 is a wasteful number, since it uses less digits than its factorization.

1642555260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013944 (or 1013933 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1642555260 is about 40528.4500073714. The cubic root of 1642555260 is about 1179.8858598780.

The spelling of 1642555260 in words is "one billion, six hundred forty-two million, five hundred fifty-five thousand, two hundred sixty".