61632621 has 12 divisors (see below), whose sum is σ = 89161020. Its totient is φ = 41025600.

The previous prime is 61632583. The next prime is 61632643. The reversal of 61632621 is 12623616.

61632621 is a `hidden beast` number, since 6 + 1 + 6 + 32 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38303721 + 23328900 = 6189^2 + 4830^2 .

It is not a de Polignac number, because 61632621 - 2¹⁰ = 61631597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61632691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 11193.

It is an arithmetic number, because the mean of its divisors is an integer number (7430085).

Almost surely, 2^61632621 is an apocalyptic number.

It is an amenable number.

61632621 is a deficient number, since it is larger than the sum of its proper divisors (27528399).

61632621 is a wasteful number, since it uses less digits than its factorization.

61632621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10476 (or 10473 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 61632621 is about 7850.6446232141. The cubic root of 61632621 is about 395.0058664941.

The spelling of 61632621 in words is "sixty-one million, six hundred thirty-two thousand, six hundred twenty-one".