91000200002 has 4 divisors (see below), whose sum is σ = 136500300006. Its totient is φ = 45500100000.

The previous prime is 91000199897. The next prime is 91000200037. The reversal of 91000200002 is 20000200019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72318504241 + 18681695761 = 268921^2 + 136681^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91000200002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22750049999 + ... + 22750050002.

Almost surely, 2^91000200002 is an apocalyptic number.

91000200002 is a deficient number, since it is larger than the sum of its proper divisors (45500100004).

91000200002 is a wasteful number, since it uses less digits than its factorization.

91000200002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45500100003.

The product of its (nonzero) digits is 36, while the sum is 14.

The spelling of 91000200002 in words is "ninety-one billion, two hundred thousand, two".