61631072 has 12 divisors (see below), whose sum is σ = 121336236. Its totient is φ = 30815520.

The previous prime is 61631039. The next prime is 61631093. The reversal of 61631072 is 27013616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962954 + ... + 963017.

It is an arithmetic number, because the mean of its divisors is an integer number (10111353).

Almost surely, 2^61631072 is an apocalyptic number.

It is an amenable number.

61631072 is a deficient number, since it is larger than the sum of its proper divisors (59705164).

61631072 is a wasteful number, since it uses less digits than its factorization.

61631072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925981 (or 1925973 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 61631072 is about 7850.5459682751. The cubic root of 61631072 is about 395.0025572659.

Adding to 61631072 its reverse (27013616), we get a palindrome (88644688).

The spelling of 61631072 in words is "sixty-one million, six hundred thirty-one thousand, seventy-two".