1648928631 has 8 divisors (see below), whose sum is σ = 2512653184. Its totient is φ = 942244920.

The previous prime is 1648928629. The next prime is 1648928689. The reversal of 1648928631 is 1368298461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1648928631 - 2¹ = 1648928629 is a prime.

It is a super-2 number, since 2×1648928631² = 5437931260263068322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648928731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39260185 + ... + 39260226.

It is an arithmetic number, because the mean of its divisors is an integer number (314081648).

Almost surely, 2^1648928631 is an apocalyptic number.

1648928631 is a deficient number, since it is larger than the sum of its proper divisors (863724553).

1648928631 is an equidigital number, since it uses as much as digits as its factorization.

1648928631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78520421.

The product of its digits is 497664, while the sum is 48.

The square root of 1648928631 is about 40607.0022409929. The cubic root of 1648928631 is about 1181.4099375053.

The spelling of 1648928631 in words is "one billion, six hundred forty-eight million, nine hundred twenty-eight thousand, six hundred thirty-one".