61201617100 has 36 divisors (see below), whose sum is σ = 143023474384. Its totient is φ = 22597519680.

The previous prime is 61201617067. The next prime is 61201617109. The reversal of 61201617100 is 171610216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (61201617109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23537784 + ... + 23540383.

Almost surely, 2^61201617100 is an apocalyptic number.

It is an amenable number.

61201617100 is an abundant number, since it is smaller than the sum of its proper divisors (81821857284).

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

61201617100 is a wasteful number, since it uses less digits than its factorization.

61201617100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47078194 (or 47078187 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 61201617100 in words is "sixty-one billion, two hundred one million, six hundred seventeen thousand, one hundred".