61103378752 has 28 divisors (see below), whose sum is σ = 130579097236. Its totient is φ = 28201559040.

The previous prime is 61103378731. The next prime is 61103378759. The reversal of 61103378752 is 25787330116.

It can be written as a sum of positive squares in 2 ways, for example, as 16338974976 + 44764403776 = 127824^2 + 211576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61103378699 and 61103378708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61103378759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36719949 + ... + 36721612.

It is an arithmetic number, because the mean of its divisors is an integer number (4663539187).

Almost surely, 2^61103378752 is an apocalyptic number.

It is an amenable number.

61103378752 is an abundant number, since it is smaller than the sum of its proper divisors (69475718484).

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

61103378752 is a wasteful number, since it uses less digits than its factorization.

61103378752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73441586 (or 73441576 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 61103378752 in words is "sixty-one billion, one hundred three million, three hundred seventy-eight thousand, seven hundred fifty-two".