1948660816 has 20 divisors (see below), whose sum is σ = 3788975124. Its totient is φ = 970860800.

The previous prime is 1948660807. The next prime is 1948660823. The reversal of 1948660816 is 6180668491.

It can be written as a sum of positive squares in 2 ways, for example, as 435139600 + 1513521216 = 20860^2 + 38904^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1948660816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212215 + ... + 221206.

Almost surely, 2^1948660816 is an apocalyptic number.

1948660816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1948660816 is a deficient number, since it is larger than the sum of its proper divisors (1840314308).

1948660816 is a wasteful number, since it uses less digits than its factorization.

1948660816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433710 (or 433704 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1948660816 is about 44143.6384544818. The cubic root of 1948660816 is about 1249.0469142334.

The spelling of 1948660816 in words is "one billion, nine hundred forty-eight million, six hundred sixty thousand, eight hundred sixteen".