2148739956 has 72 divisors (see below), whose sum is σ = 6273880704. Its totient is φ = 612829440.

The previous prime is 2148739933. The next prime is 2148739969. The reversal of 2148739956 is 6599378412.

2148739956 is a `hidden beast` number, since 21 + 487 + 3 + 99 + 56 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152860 + ... + 166323.

It is an arithmetic number, because the mean of its divisors is an integer number (87137232).

Almost surely, 2^2148739956 is an apocalyptic number.

It is an amenable number.

2148739956 is an abundant number, since it is smaller than the sum of its proper divisors (4125140748).

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

2148739956 is a wasteful number, since it uses less digits than its factorization.

2148739956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319221 (or 319216 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 2148739956 is about 46354.5030822249. The cubic root of 2148739956 is about 1290.4106931039.

The spelling of 2148739956 in words is "two billion, one hundred forty-eight million, seven hundred thirty-nine thousand, nine hundred fifty-six".