101005616778 has 32 divisors (see below), whose sum is σ = 223394749632. Its totient is φ = 30188476800.

The previous prime is 101005616753. The next prime is 101005616783. The reversal of 101005616778 is 877616500101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10477293 + ... + 10486928.

It is an arithmetic number, because the mean of its divisors is an integer number (6981085926).

Almost surely, 2^101005616778 is an apocalyptic number.

101005616778 is an abundant number, since it is smaller than the sum of its proper divisors (122389132854).

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

101005616778 is a wasteful number, since it uses less digits than its factorization.

101005616778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20964310.

The product of its (nonzero) digits is 70560, while the sum is 42.

The spelling of 101005616778 in words is "one hundred one billion, five million, six hundred sixteen thousand, seven hundred seventy-eight".