91312148042 has 16 divisors (see below), whose sum is σ = 148562377992. Its totient is φ = 41922362880.

The previous prime is 91312148003. The next prime is 91312148071. The reversal of 91312148042 is 24084121319.

It is a Cunningham number, because it is equal to 302179²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 71091023641 + 20221124401 = 266629^2 + 142201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91312147993 and 91312148011.

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, 32750453 + ... + 32753240.

Almost surely, 2^91312148042 is an apocalyptic number.

91312148042 is a deficient number, since it is larger than the sum of its proper divisors (57250229950).

91312148042 is a wasteful number, since it uses less digits than its factorization.

91312148042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65503753.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 91312148042 in words is "ninety-one billion, three hundred twelve million, one hundred forty-eight thousand, forty-two".