1640508552 has 48 divisors (see below), whose sum is σ = 4607606640. Its totient is φ = 546835536.

The previous prime is 1640508547. The next prime is 1640508581. The reversal of 1640508552 is 2558050461.

1640508552 is a `hidden beast` number, since 1 + 640 + 5 + 0 + 8 + 5 + 5 + 2 = 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419998 + ... + 423885.

It is an arithmetic number, because the mean of its divisors is an integer number (95991805).

Almost surely, 2^1640508552 is an apocalyptic number.

1640508552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640508552 is an abundant number, since it is smaller than the sum of its proper divisors (2967098088).

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

1640508552 is an equidigital number, since it uses as much as digits as its factorization.

1640508552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843904 (or 843888 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 1640508552 is about 40503.1918742215. The cubic root of 1640508552 is about 1179.3955901127.

The spelling of 1640508552 in words is "one billion, six hundred forty million, five hundred eight thousand, five hundred fifty-two".