1642560465 has 64 divisors (see below), whose sum is σ = 3303530496. Its totient is φ = 678350592.

The previous prime is 1642560457. The next prime is 1642560511. The reversal of 1642560465 is 5640652461.

It is not a de Polignac number, because 1642560465 - 2³ = 1642560457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 51354 + ... + 76956.

It is an arithmetic number, because the mean of its divisors is an integer number (51617664).

Almost surely, 2^1642560465 is an apocalyptic number.

1642560465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642560465 is an abundant number, since it is smaller than the sum of its proper divisors (1660970031).

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

1642560465 is a wasteful number, since it uses less digits than its factorization.

1642560465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25678.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 1642560465 is about 40528.5142214713. The cubic root of 1642560465 is about 1179.8871061678.

The spelling of 1642560465 in words is "one billion, six hundred forty-two million, five hundred sixty thousand, four hundred sixty-five".