1581601443801 has 8 divisors (see below), whose sum is σ = 2128148732160. Its totient is φ = 1044727558992.

The previous prime is 1581601443791. The next prime is 1581601443817. The reversal of 1581601443801 is 1083441061851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1581601443801 - 2²² = 1581597249497 is a prime.

It is a super-2 number, since 2×1581601443801² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1581601443101) 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, 2418350505 + ... + 2418351158.

It is an arithmetic number, because the mean of its divisors is an integer number (266018591520).

Almost surely, 2^{1581601443801} is an apocalyptic number.

It is an amenable number.

1581601443801 is a deficient number, since it is larger than the sum of its proper divisors (546547288359).

1581601443801 is a wasteful number, since it uses less digits than its factorization.

1581601443801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836701775.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 1581601443801 in words is "one trillion, five hundred eighty-one billion, six hundred one million, four hundred forty-three thousand, eight hundred one".