155581020463 has 16 divisors (see below), whose sum is σ = 171081187200. Its totient is φ = 140308541280.

The previous prime is 155581020457. The next prime is 155581020473. The reversal of 155581020463 is 364020185551.

It is a cyclic number.

It is not a de Polignac number, because 155581020463 - 2⁵ = 155581020431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155581020433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1922053 + ... + 2001361.

It is an arithmetic number, because the mean of its divisors is an integer number (10692574200).

Almost surely, 2^155581020463 is an apocalyptic number.

155581020463 is a deficient number, since it is larger than the sum of its proper divisors (15500166737).

155581020463 is a wasteful number, since it uses less digits than its factorization.

155581020463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80742.

The product of its (nonzero) digits is 144000, while the sum is 40.

It can be divided in two parts, 1555 and 81020463, that added together give a palindrome (81022018).

The spelling of 155581020463 in words is "one hundred fifty-five billion, five hundred eighty-one million, twenty thousand, four hundred sixty-three".