101491816 has 8 divisors (see below), whose sum is σ = 190297170. Its totient is φ = 50745904.

The previous prime is 101491757. The next prime is 101491837. The reversal of 101491816 is 618194101.

It can be written as a sum of positive squares in only one way, i.e., 99400900 + 2090916 = 9970^2 + 1446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6343231 + ... + 6343246.

Almost surely, 2^101491816 is an apocalyptic number.

It is an amenable number.

101491816 is a deficient number, since it is larger than the sum of its proper divisors (88805354).

101491816 is a wasteful number, since it uses less digits than its factorization.

101491816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12686483 (or 12686479 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 101491816 is about 10074.3146665170. The cubic root of 101491816 is about 466.4556320186.

The spelling of 101491816 in words is "one hundred one million, four hundred ninety-one thousand, eight hundred sixteen".