1581348156 has 24 divisors (see below), whose sum is σ = 3708547920. Its totient is φ = 524439552.

The previous prime is 1581348133. The next prime is 1581348157. The reversal of 1581348156 is 6518431851.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581348157) 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, 332101 + ... + 336828.

It is an arithmetic number, because the mean of its divisors is an integer number (154522830).

Almost surely, 2^1581348156 is an apocalyptic number.

It is an amenable number.

1581348156 is an abundant number, since it is smaller than the sum of its proper divisors (2127199764).

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

1581348156 is a wasteful number, since it uses less digits than its factorization.

1581348156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669133 (or 669131 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 1581348156 is about 39766.1684852841. The cubic root of 1581348156 is about 1165.0444593666.

The spelling of 1581348156 in words is "one billion, five hundred eighty-one million, three hundred forty-eight thousand, one hundred fifty-six".