61357638 has 16 divisors (see below), whose sum is σ = 122797296. Its totient is φ = 20438880.

The previous prime is 61357633. The next prime is 61357651. The reversal of 61357638 is 83675316.

61357638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61357596 and 61357605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61357633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10968 + ... + 15588.

It is an arithmetic number, because the mean of its divisors is an integer number (7674831).

Almost surely, 2^61357638 is an apocalyptic number.

61357638 is an abundant number, since it is smaller than the sum of its proper divisors (61439658).

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

61357638 is a wasteful number, since it uses less digits than its factorization.

61357638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839.

The product of its digits is 90720, while the sum is 39.

The square root of 61357638 is about 7833.1116422530. Note that the first 3 decimals coincide. The cubic root of 61357638 is about 394.4175317278.

The spelling of 61357638 in words is "sixty-one million, three hundred fifty-seven thousand, six hundred thirty-eight".