91903667498 has 4 divisors (see below), whose sum is σ = 137855501250. Its totient is φ = 45951833748.

The previous prime is 91903667437. The next prime is 91903667519. The reversal of 91903667498 is 89476630919.

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., 78693153529 + 13210513969 = 280523^2 + 114937^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 91903667498.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22975916873 + ... + 22975916876.

Almost surely, 2^91903667498 is an apocalyptic number.

91903667498 is a deficient number, since it is larger than the sum of its proper divisors (45951833752).

91903667498 is a wasteful number, since it uses less digits than its factorization.

91903667498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45951833751.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 91903667498 in words is "ninety-one billion, nine hundred three million, six hundred sixty-seven thousand, four hundred ninety-eight".