61618157 has 8 divisors (see below), whose sum is σ = 62284992. Its totient is φ = 60955200.

The previous prime is 61618133. The next prime is 61618169. The reversal of 61618157 is 75181616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61618157 - 2⁶ = 61618093 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 (61618177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39482 + ... + 41012.

It is an arithmetic number, because the mean of its divisors is an integer number (7785624).

Almost surely, 2^61618157 is an apocalyptic number.

It is an amenable number.

61618157 is a deficient number, since it is larger than the sum of its proper divisors (666835).

61618157 is a wasteful number, since it uses less digits than its factorization.

61618157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its digits is 10080, while the sum is 35.

The square root of 61618157 is about 7849.7233709221. The cubic root of 61618157 is about 394.9749639636.

The spelling of 61618157 in words is "sixty-one million, six hundred eighteen thousand, one hundred fifty-seven".