61201812 has 96 divisors (see below), whose sum is σ = 177479680. Its totient is φ = 16018560.

The previous prime is 61201801. The next prime is 61201837. The reversal of 61201812 is 21810216.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 48858 + ... + 50094.

Almost surely, 2^61201812 is an apocalyptic number.

61201812 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61201812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88739840).

61201812 is an abundant number, since it is smaller than the sum of its proper divisors (116277868).

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

61201812 is a wasteful number, since it uses less digits than its factorization.

61201812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 61201812 is about 7823.1586970993. The cubic root of 61201812 is about 394.0833564949.

The spelling of 61201812 in words is "sixty-one million, two hundred one thousand, eight hundred twelve".