61651551016 has 32 divisors (see below), whose sum is σ = 128788548480. Its totient is φ = 27427187200.

The previous prime is 61651550999. The next prime is 61651551023. The reversal of 61651551016 is 61015515616.

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, 7448905 + ... + 7457176.

It is an arithmetic number, because the mean of its divisors is an integer number (4024642140).

Almost surely, 2^61651551016 is an apocalyptic number.

It is an amenable number.

61651551016 is an abundant number, since it is smaller than the sum of its proper divisors (67136997464).

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

61651551016 is a wasteful number, since it uses less digits than its factorization.

61651551016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14906145 (or 14906141 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 61651551016 in words is "sixty-one billion, six hundred fifty-one million, five hundred fifty-one thousand, sixteen".