61471656 has 32 divisors (see below), whose sum is σ = 170755200. Its totient is φ = 20490480.

The previous prime is 61471637. The next prime is 61471673. The reversal of 61471656 is 65617416.

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 61471656.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142080 + ... + 142511.

It is an arithmetic number, because the mean of its divisors is an integer number (5336100).

Almost surely, 2^61471656 is an apocalyptic number.

It is an amenable number.

61471656 is an abundant number, since it is smaller than the sum of its proper divisors (109283544).

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

61471656 is a wasteful number, since it uses less digits than its factorization.

61471656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284606 (or 284596 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61471656 is about 7840.3862149769. The cubic root of 61471656 is about 394.6616897098.

Subtracting 61471656 from its reverse (65617416), we obtain a triangular number (4145760 = T₂₈₇₉).

The spelling of 61471656 in words is "sixty-one million, four hundred seventy-one thousand, six hundred fifty-six".