61276215104 has 56 divisors (see below), whose sum is σ = 131034190560. Its totient is φ = 28262813184.

The previous prime is 61276215089. The next prime is 61276215139. The reversal of 61276215104 is 40151267216.

It is a congruent number.

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, 1290407 + ... + 1337049.

It is an arithmetic number, because the mean of its divisors is an integer number (2339896260).

Almost surely, 2^61276215104 is an apocalyptic number.

61276215104 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61276215104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65517095280).

61276215104 is an abundant number, since it is smaller than the sum of its proper divisors (69757975456).

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

61276215104 is a wasteful number, since it uses less digits than its factorization.

61276215104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48247 (or 48237 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 61276215104 in words is "sixty-one billion, two hundred seventy-six million, two hundred fifteen thousand, one hundred four".