61211016 has 96 divisors (see below), whose sum is σ = 179768160. Its totient is φ = 18740736.

The previous prime is 61210997. The next prime is 61211023. The reversal of 61211016 is 61011216.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 61211016.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52051 + ... + 53213.

It is an arithmetic number, because the mean of its divisors is an integer number (1872585).

Almost surely, 2^61211016 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 61211016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89884080).

61211016 is an abundant number, since it is smaller than the sum of its proper divisors (118557144).

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

61211016 is a wasteful number, since it uses less digits than its factorization.

61211016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 61211016 is about 7823.7469284225. The cubic root of 61211016 is about 394.1031106018.

It can be divided in two parts, 612 and 11016, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 61211016 in words is "sixty-one million, two hundred eleven thousand, sixteen".