1642737660 has 48 divisors (see below), whose sum is σ = 4655097216. Its totient is φ = 432784192.

The previous prime is 1642737631. The next prime is 1642737661. The reversal of 1642737660 is 667372461.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642737661) 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 15 ways as a sum of consecutive naturals, for example, 159954 + ... + 169913.

It is an arithmetic number, because the mean of its divisors is an integer number (96981192).

Almost surely, 2^1642737660 is an apocalyptic number.

1642737660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642737660 is an abundant number, since it is smaller than the sum of its proper divisors (3012359556).

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

1642737660 is a wasteful number, since it uses less digits than its factorization.

1642737660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329962 (or 329960 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 1642737660 is about 40530.7002160091. The cubic root of 1642737660 is about 1179.9295323235.

The spelling of 1642737660 in words is "one billion, six hundred forty-two million, seven hundred thirty-seven thousand, six hundred sixty".