61413639 has 16 divisors (see below), whose sum is σ = 99088128. Its totient is φ = 33028992.

The previous prime is 61413637. The next prime is 61413661. The reversal of 61413639 is 93631416.

It is not a de Polignac number, because 61413639 - 2¹ = 61413637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61413637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85657 + ... + 86370.

It is an arithmetic number, because the mean of its divisors is an integer number (6193008).

Almost surely, 2^61413639 is an apocalyptic number.

61413639 is a deficient number, since it is larger than the sum of its proper divisors (37674489).

61413639 is a wasteful number, since it uses less digits than its factorization.

61413639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172054.

The product of its digits is 11664, while the sum is 33.

The square root of 61413639 is about 7836.6854600654. The cubic root of 61413639 is about 394.5374899514.

The spelling of 61413639 in words is "sixty-one million, four hundred thirteen thousand, six hundred thirty-nine".