611485121820 has 48 divisors (see below), whose sum is σ = 1714494287520. Its totient is φ = 162840228096.

The previous prime is 611485121777. The next prime is 611485121839. The reversal of 611485121820 is 28121584116.

It is a super-2 number, since 2×611485121820² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6907875 + ... + 6995834.

It is an arithmetic number, because the mean of its divisors is an integer number (35718630990).

Almost surely, 2^611485121820 is an apocalyptic number.

611485121820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

611485121820 is an abundant number, since it is smaller than the sum of its proper divisors (1103009165700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

611485121820 is a wasteful number, since it uses less digits than its factorization.

611485121820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13904454 (or 13904452 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 611485121820 in words is "six hundred eleven billion, four hundred eighty-five million, one hundred twenty-one thousand, eight hundred twenty".