61172638 has 8 divisors (see below), whose sum is σ = 91940760. Its totient is φ = 30525720.

The previous prime is 61172633. The next prime is 61172669. The reversal of 61172638 is 83627116.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61172633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29028 + ... + 31063.

It is an arithmetic number, because the mean of its divisors is an integer number (11492595).

Almost surely, 2^61172638 is an apocalyptic number.

61172638 is a deficient number, since it is larger than the sum of its proper divisors (30768122).

61172638 is a wasteful number, since it uses less digits than its factorization.

61172638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60602.

The product of its digits is 12096, while the sum is 34.

The square root of 61172638 is about 7821.2938827281. The cubic root of 61172638 is about 394.0207286371.

The spelling of 61172638 in words is "sixty-one million, one hundred seventy-two thousand, six hundred thirty-eight".