61444157 has 4 divisors (see below), whose sum is σ = 64678080. Its totient is φ = 58210236.

The previous prime is 61444121. The next prime is 61444189. The reversal of 61444157 is 75144416.

61444157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61444157 - 2⁶ = 61444093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61444657) 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 3 ways as a sum of consecutive naturals, for example, 1616933 + ... + 1616970.

It is an arithmetic number, because the mean of its divisors is an integer number (16169520).

Almost surely, 2^61444157 is an apocalyptic number.

It is an amenable number.

61444157 is a deficient number, since it is larger than the sum of its proper divisors (3233923).

61444157 is a wasteful number, since it uses less digits than its factorization.

61444157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233922.

The product of its digits is 13440, while the sum is 32.

The square root of 61444157 is about 7838.6323424434. The cubic root of 61444157 is about 394.6028310356.

It can be divided in two parts, 6144 and 4157, that added together give a palindrome (10301).

The spelling of 61444157 in words is "sixty-one million, four hundred forty-four thousand, one hundred fifty-seven".