61051551008 has 24 divisors (see below), whose sum is σ = 137365990272. Its totient is φ = 26164950336.

The previous prime is 61051550981. The next prime is 61051551023. The reversal of 61051551008 is 80015515016.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136275560 + ... + 136276007.

It is an arithmetic number, because the mean of its divisors is an integer number (5723582928).

Almost surely, 2^61051551008 is an apocalyptic number.

It is an amenable number.

61051551008 is an abundant number, since it is smaller than the sum of its proper divisors (76314439264).

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

61051551008 is a wasteful number, since it uses less digits than its factorization.

61051551008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272551584 (or 272551576 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 32.

The spelling of 61051551008 in words is "sixty-one billion, fifty-one million, five hundred fifty-one thousand, eight".