1649397696 has 56 divisors (see below), whose sum is σ = 4456907520. Its totient is φ = 538098432.

The previous prime is 1649397691. The next prime is 1649397713. The reversal of 1649397696 is 6967939461.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649397691) 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, 82366 + ... + 100413.

Almost surely, 2^1649397696 is an apocalyptic number.

1649397696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1649397696 is an abundant number, since it is smaller than the sum of its proper divisors (2807509824).

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

1649397696 is a wasteful number, since it uses less digits than its factorization.

1649397696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182841 (or 182831 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 60.

The square root of 1649397696 is about 40612.7774967436. Note that the first 3 decimals coincide. The cubic root of 1649397696 is about 1181.5219507450.

The spelling of 1649397696 in words is "one billion, six hundred forty-nine million, three hundred ninety-seven thousand, six hundred ninety-six".