61011020 has 48 divisors (see below), whose sum is σ = 147883008. Its totient is φ = 20710080.

The previous prime is 61010953. The next prime is 61011053. The reversal of 61011020 is 2011016.

61011020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61011020² = 7444689122880800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61010992 and 61011010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12305 + ... + 16535.

It is an arithmetic number, because the mean of its divisors is an integer number (3080896).

Almost surely, 2^61011020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73941504).

61011020 is an abundant number, since it is smaller than the sum of its proper divisors (86871988).

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

61011020 is a wasteful number, since it uses less digits than its factorization.

61011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350 (or 4348 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 61011020 is about 7810.9551272556. The cubic root of 61011020 is about 393.6734219096.

Adding to 61011020 its reverse (2011016), we get a palindrome (63022036).

The spelling of 61011020 in words is "sixty-one million, eleven thousand, twenty".