61141557 has 8 divisors (see below), whose sum is σ = 81560160. Its totient is φ = 40742000.

The previous prime is 61141547. The next prime is 61141559. The reversal of 61141557 is 75514116.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61141557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61141559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6619 + ... + 12887.

It is an arithmetic number, because the mean of its divisors is an integer number (10195020).

Almost surely, 2^61141557 is an apocalyptic number.

It is an amenable number.

61141557 is a deficient number, since it is larger than the sum of its proper divisors (20418603).

61141557 is a wasteful number, since it uses less digits than its factorization.

61141557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9523.

The product of its digits is 4200, while the sum is 30.

The square root of 61141557 is about 7819.3066828204. The cubic root of 61141557 is about 393.9539851095.

The spelling of 61141557 in words is "sixty-one million, one hundred forty-one thousand, five hundred fifty-seven".