1642659051 has 64 divisors (see below), whose sum is σ = 2607883776. Its totient is φ = 908544000.

The previous prime is 1642659023. The next prime is 1642659077. The reversal of 1642659051 is 1509562461.

It is not a de Polignac number, because 1642659051 - 2⁶ = 1642658987 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1642659251) 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 63 ways as a sum of consecutive naturals, for example, 3002760 + ... + 3003306.

It is an arithmetic number, because the mean of its divisors is an integer number (40748184).

Almost surely, 2^1642659051 is an apocalyptic number.

1642659051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1642659051 is a deficient number, since it is larger than the sum of its proper divisors (965224725).

1642659051 is a wasteful number, since it uses less digits than its factorization.

1642659051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 1642659051 is about 40529.7304580230. The cubic root of 1642659051 is about 1179.9107111889.

The spelling of 1642659051 in words is "one billion, six hundred forty-two million, six hundred fifty-nine thousand, fifty-one".