61015500550 has 24 divisors (see below), whose sum is σ = 118423130256. Its totient is φ = 23345060640.

The previous prime is 61015500523. The next prime is 61015500587. The reversal of 61015500550 is 5500551016.

61015500550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26527329 + ... + 26529628.

It is an arithmetic number, because the mean of its divisors is an integer number (4934297094).

Almost surely, 2^61015500550 is an apocalyptic number.

61015500550 is a deficient number, since it is larger than the sum of its proper divisors (57407629706).

61015500550 is a wasteful number, since it uses less digits than its factorization.

61015500550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53056992 (or 53056987 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 61015500550 in words is "sixty-one billion, fifteen million, five hundred thousand, five hundred fifty".