61170821178 has 16 divisors (see below), whose sum is σ = 123017565216. Its totient is φ = 20277619920.

The previous prime is 61170821171. The next prime is 61170821219. The reversal of 61170821178 is 87112807116.

It is a super-3 number, since 3×61170821178³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61170821171) 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, 28162276 + ... + 28164447.

It is an arithmetic number, because the mean of its divisors is an integer number (7688597826).

Almost surely, 2^61170821178 is an apocalyptic number.

61170821178 is an abundant number, since it is smaller than the sum of its proper divisors (61846744038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61170821178 is a wasteful number, since it uses less digits than its factorization.

61170821178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56326909.

The product of its (nonzero) digits is 37632, while the sum is 42.

The spelling of 61170821178 in words is "sixty-one billion, one hundred seventy million, eight hundred twenty-one thousand, one hundred seventy-eight".