61203624021 has 12 divisors (see below), whose sum is σ = 88409775948. Its totient is φ = 40800320064.

The previous prime is 61203624019. The next prime is 61203624067. The reversal of 61203624021 is 12042630216.

61203624021 is a `hidden beast` number, since 6 + 12 + 0 + 3 + 624 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54003252996 + 7200371025 = 232386^2 + 84855^2 .

It is not a de Polignac number, because 61203624021 - 2¹ = 61203624019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61203624071) 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, 21921 + ... + 350553.

It is an arithmetic number, because the mean of its divisors is an integer number (7367481329).

Almost surely, 2^61203624021 is an apocalyptic number.

It is an amenable number.

61203624021 is a deficient number, since it is larger than the sum of its proper divisors (27206151927).

61203624021 is a wasteful number, since it uses less digits than its factorization.

61203624021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349332 (or 349329 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 61203624021 in words is "sixty-one billion, two hundred three million, six hundred twenty-four thousand, twenty-one".