61051551500 has 48 divisors (see below), whose sum is σ = 133441439040. Its totient is φ = 24401417600.

The previous prime is 61051551499. The next prime is 61051551503. The reversal of 61051551500 is 515515016.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61051551503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597137 + ... + 691863.

It is an arithmetic number, because the mean of its divisors is an integer number (2780029980).

Almost surely, 2^61051551500 is an apocalyptic number.

It is an amenable number.

61051551500 is an abundant number, since it is smaller than the sum of its proper divisors (72389887540).

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

61051551500 is a wasteful number, since it uses less digits than its factorization.

61051551500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96035 (or 96023 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 61051551500 in words is "sixty-one billion, fifty-one million, five hundred fifty-one thousand, five hundred".