1581412155 has 16 divisors (see below), whose sum is σ = 2538350880. Its totient is φ = 840722688.

The previous prime is 1581412121. The next prime is 1581412177. The reversal of 1581412155 is 5512141851.

It is not a de Polignac number, because 1581412155 - 2²⁸ = 1312976699 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163720 + ... + 173109.

It is an arithmetic number, because the mean of its divisors is an integer number (158646930).

Almost surely, 2^1581412155 is an apocalyptic number.

1581412155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1581412155 is a deficient number, since it is larger than the sum of its proper divisors (956938725).

1581412155 is a wasteful number, since it uses less digits than its factorization.

1581412155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337150.

The product of its digits is 8000, while the sum is 33.

The square root of 1581412155 is about 39766.9731686987. The cubic root of 1581412155 is about 1165.0601760563.

The spelling of 1581412155 in words is "one billion, five hundred eighty-one million, four hundred twelve thousand, one hundred fifty-five".