61641163741238 has 8 divisors (see below), whose sum is σ = 94429016795232. Its totient is φ = 30164824809496.

The previous prime is 61641163741231. The next prime is 61641163741247. The reversal of 61641163741238 is 83214736114616.

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

It is a super-2 number, since 2×61641163741238² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61641163741238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61641163741231) 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, 327878530445 + ... + 327878530632.

It is an arithmetic number, because the mean of its divisors is an integer number (11803627099404).

Almost surely, 2^{61641163741238} is an apocalyptic number.

61641163741238 is a deficient number, since it is larger than the sum of its proper divisors (32787853053994).

61641163741238 is a wasteful number, since it uses less digits than its factorization.

61641163741238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655757061126.

The product of its digits is 3483648, while the sum is 53.

The spelling of 61641163741238 in words is "sixty-one trillion, six hundred forty-one billion, one hundred sixty-three million, seven hundred forty-one thousand, two hundred thirty-eight".