91918705391852 has 6 divisors (see below), whose sum is σ = 160857734435748. Its totient is φ = 45959352695924.

The previous prime is 91918705391831. The next prime is 91918705391861. The reversal of 91918705391852 is 25819350781919.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11489838173978 + ... + 11489838173985.

It is an arithmetic number, because the mean of its divisors is an integer number (26809622405958).

Almost surely, 2^{91918705391852} is an apocalyptic number.

It is an amenable number.

91918705391852 is a deficient number, since it is larger than the sum of its proper divisors (68939029043896).

91918705391852 is a wasteful number, since it uses less digits than its factorization.

91918705391852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22979676347967 (or 22979676347965 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 68.

The spelling of 91918705391852 in words is "ninety-one trillion, nine hundred eighteen billion, seven hundred five million, three hundred ninety-one thousand, eight hundred fifty-two".