61336636242 has 64 divisors (see below), whose sum is σ = 149099304960. Its totient is φ = 16421181696.

The previous prime is 61336636241. The next prime is 61336636303. The reversal of 61336636242 is 24263663316.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 61336636194 and 61336636203.

It is not an unprimeable number, because it can be changed into a prime (61336636241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27142 + ... + 351297.

It is an arithmetic number, because the mean of its divisors is an integer number (2329676640).

Almost surely, 2^61336636242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61336636242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74549652480).

61336636242 is an abundant number, since it is smaller than the sum of its proper divisors (87762668718).

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

61336636242 is a wasteful number, since it uses less digits than its factorization.

61336636242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378695.

The product of its digits is 559872, while the sum is 42.

The spelling of 61336636242 in words is "sixty-one billion, three hundred thirty-six million, six hundred thirty-six thousand, two hundred forty-two".