1648537740 has 36 divisors (see below), whose sum is σ = 5000565024. Its totient is φ = 439610016.

The previous prime is 1648537729. The next prime is 1648537769. The reversal of 1648537740 is 477358461.

1648537740 is a `hidden beast` number, since 1 + 6 + 48 + 537 + 74 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 4579092 + ... + 4579451.

It is an arithmetic number, because the mean of its divisors is an integer number (138904584).

Almost surely, 2^1648537740 is an apocalyptic number.

1648537740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648537740 is an abundant number, since it is smaller than the sum of its proper divisors (3352027284).

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

1648537740 is a wasteful number, since it uses less digits than its factorization.

1648537740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9158558 (or 9158553 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 1648537740 is about 40602.1888572525. The cubic root of 1648537740 is about 1181.3165760746.

The spelling of 1648537740 in words is "one billion, six hundred forty-eight million, five hundred thirty-seven thousand, seven hundred forty".