61711956 has 60 divisors (see below), whose sum is σ = 163437120. Its totient is φ = 20301840.

The previous prime is 61711939. The next prime is 61711957. The reversal of 61711956 is 65911716.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61711956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61711957) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24391 + ... + 26801.

It is an arithmetic number, because the mean of its divisors is an integer number (2723952).

Almost surely, 2^61711956 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 61711956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81718560).

61711956 is an abundant number, since it is smaller than the sum of its proper divisors (101725164).

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

61711956 is a wasteful number, since it uses less digits than its factorization.

61711956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506 (or 2495 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 61711956 is about 7855.6957680399. The cubic root of 61711956 is about 395.1752808576.

The spelling of 61711956 in words is "sixty-one million, seven hundred eleven thousand, nine hundred fifty-six".