1381756506 has 96 divisors (see below), whose sum is σ = 3087927360. Its totient is φ = 411840000.

The previous prime is 1381756471. The next prime is 1381756547. The reversal of 1381756506 is 6056571831.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5504881 + ... + 5505131.

It is an arithmetic number, because the mean of its divisors is an integer number (32165910).

Almost surely, 2^1381756506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381756506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543963680).

1381756506 is an abundant number, since it is smaller than the sum of its proper divisors (1706170854).

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

1381756506 is a wasteful number, since it uses less digits than its factorization.

1381756506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1381756506 is about 37171.9854998358. The cubic root of 1381756506 is about 1113.8084440177.

The spelling of 1381756506 in words is "one billion, three hundred eighty-one million, seven hundred fifty-six thousand, five hundred six".