61100215000 has 80 divisors (see below), whose sum is σ = 156172290120. Its totient is φ = 22218240000.

The previous prime is 61100214961. The next prime is 61100215003. The reversal of 61100215000 is 51200116.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61100215003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 500457 + ... + 610456.

Almost surely, 2^61100215000 is an apocalyptic number.

It is an amenable number.

61100215000 is an abundant number, since it is smaller than the sum of its proper divisors (95072075120).

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

61100215000 is a wasteful number, since it uses less digits than its factorization.

61100215000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110950 (or 1110931 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 61100215000 its reverse (51200116), we get a palindrome (61151415116).

The spelling of 61100215000 in words is "sixty-one billion, one hundred million, two hundred fifteen thousand".