61157638 has 8 divisors (see below), whose sum is σ = 91784088. Its totient is φ = 30562944.

The previous prime is 61157617. The next prime is 61157639. The reversal of 61157638 is 83675116.

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

It is a junction number, because it is equal to n+sod(n) for n = 61157597 and 61157606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61157639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2331 + ... + 11302.

It is an arithmetic number, because the mean of its divisors is an integer number (11473011).

Almost surely, 2^61157638 is an apocalyptic number.

61157638 is a deficient number, since it is larger than the sum of its proper divisors (30626450).

61157638 is a wasteful number, since it uses less digits than its factorization.

61157638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15878.

The product of its digits is 30240, while the sum is 37.

The square root of 61157638 is about 7820.3349033146. The cubic root of 61157638 is about 393.9885203695.

The spelling of 61157638 in words is "sixty-one million, one hundred fifty-seven thousand, six hundred thirty-eight".