61198077952 has 104 divisors (see below), whose sum is σ = 133906730112. Its totient is φ = 27734016000.

The previous prime is 61198077847. The next prime is 61198077961. The reversal of 61198077952 is 25977089116.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 61198077893 and 61198077902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16533702 + ... + 16537402.

Almost surely, 2^61198077952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61198077952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66953365056).

61198077952 is an abundant number, since it is smaller than the sum of its proper divisors (72708652160).

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

61198077952 is a wasteful number, since it uses less digits than its factorization.

61198077952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103 (or 4081 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 55.

The spelling of 61198077952 in words is "sixty-one billion, one hundred ninety-eight million, seventy-seven thousand, nine hundred fifty-two".