261020020162 has 32 divisors (see below), whose sum is σ = 449649506880. Its totient is φ = 112389554880.

The previous prime is 261020020153. The next prime is 261020020169.

261020020162 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (261020020169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5072748 + ... + 5123944.

It is an arithmetic number, because the mean of its divisors is an integer number (14051547090).

Almost surely, 2^261020020162 is an apocalyptic number.

261020020162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261020020162 is a deficient number, since it is larger than the sum of its proper divisors (188629486718).

261020020162 is a wasteful number, since it uses less digits than its factorization.

261020020162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63426.

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 2610200 and 20162, that added together give a palindrome (2630362).

The spelling of 261020020162 in words is "two hundred sixty-one billion, twenty million, twenty thousand, one hundred sixty-two".