91511102002 has 4 divisors (see below), whose sum is σ = 137266653006. Its totient is φ = 45755551000.

The previous prime is 91511101973. The next prime is 91511102107. The reversal of 91511102002 is 20020111519.

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., 47167586761 + 44343515241 = 217181^2 + 210579^2 .

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, 22877775499 + ... + 22877775502.

Almost surely, 2^91511102002 is an apocalyptic number.

91511102002 is a deficient number, since it is larger than the sum of its proper divisors (45755551004).

91511102002 is a wasteful number, since it uses less digits than its factorization.

91511102002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45755551003.

The product of its (nonzero) digits is 180, while the sum is 22.

The spelling of 91511102002 in words is "ninety-one billion, five hundred eleven million, one hundred two thousand, two".