1648992021 has 16 divisors (see below), whose sum is σ = 2312409600. Its totient is φ = 1043789760.

The previous prime is 1648992001. The next prime is 1648992029. The reversal of 1648992021 is 1202998461.

It is not a de Polignac number, because 1648992021 - 2⁵ = 1648991989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648992029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162346 + ... + 172203.

It is an arithmetic number, because the mean of its divisors is an integer number (144525600).

Almost surely, 2^1648992021 is an apocalyptic number.

It is an amenable number.

1648992021 is a deficient number, since it is larger than the sum of its proper divisors (663417579).

1648992021 is a wasteful number, since it uses less digits than its factorization.

1648992021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334636.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1648992021 is about 40607.7827638988. The cubic root of 1648992021 is about 1181.4250763485.

The spelling of 1648992021 in words is "one billion, six hundred forty-eight million, nine hundred ninety-two thousand, twenty-one".