581978352155 has 32 divisors (see below), whose sum is σ = 759179433600. Its totient is φ = 426554490880.

The previous prime is 581978352127. The next prime is 581978352167. The reversal of 581978352155 is 551253879185.

It is not a de Polignac number, because 581978352155 - 2⁶ = 581978352091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 581978352094 and 581978352103.

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, 1378802 + ... + 1750728.

It is an arithmetic number, because the mean of its divisors is an integer number (23724357300).

Almost surely, 2^581978352155 is an apocalyptic number.

581978352155 is a deficient number, since it is larger than the sum of its proper divisors (177201081445).

581978352155 is a wasteful number, since it uses less digits than its factorization.

581978352155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372439.

The product of its digits is 15120000, while the sum is 59.

The spelling of 581978352155 in words is "five hundred eighty-one billion, nine hundred seventy-eight million, three hundred fifty-two thousand, one hundred fifty-five".