1581216098 has 64 divisors (see below), whose sum is σ = 3144241152. Its totient is φ = 578086080.

The previous prime is 1581216073. The next prime is 1581216103. The reversal of 1581216098 is 8906121851.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183515 + ... + 191937.

It is an arithmetic number, because the mean of its divisors is an integer number (49128768).

Almost surely, 2^1581216098 is an apocalyptic number.

1581216098 is a deficient number, since it is larger than the sum of its proper divisors (1563025054).

1581216098 is a wasteful number, since it uses less digits than its factorization.

1581216098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8519.

The product of its (nonzero) digits is 34560, while the sum is 41.

The square root of 1581216098 is about 39764.5080190866. The cubic root of 1581216098 is about 1165.0120276040.

The spelling of 1581216098 in words is "one billion, five hundred eighty-one million, two hundred sixteen thousand, ninety-eight".