61171222166015 has 8 divisors (see below), whose sum is σ = 79052040953088. Its totient is φ = 45172594830240.

The previous prime is 61171222166011. The next prime is 61171222166057. The reversal of 61171222166015 is 51066122217116.

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

It is not a de Polignac number, because 61171222166015 - 2² = 61171222166011 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 (61171222166011) 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, 470547862751 + ... + 470547862880.

It is an arithmetic number, because the mean of its divisors is an integer number (9881505119136).

Almost surely, 2^{61171222166015} is an apocalyptic number.

61171222166015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61171222166015 is a deficient number, since it is larger than the sum of its proper divisors (17880818787073).

61171222166015 is a wasteful number, since it uses less digits than its factorization.

61171222166015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941095725649.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 61171222166015 in words is "sixty-one trillion, one hundred seventy-one billion, two hundred twenty-two million, one hundred sixty-six thousand, fifteen".