91255465798378 has 128 divisors (see below), whose sum is σ = 164363686502400. Its totient is φ = 37189639807488.

The previous prime is 91255465798333. The next prime is 91255465798391. The reversal of 91255465798378 is 87389756455219.

It is a junction number, because it is equal to n+sod(n) for n = 91255465798298 and 91255465798307.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10131611551 + ... + 10131620557.

It is an arithmetic number, because the mean of its divisors is an integer number (1284091300800).

Almost surely, 2^{91255465798378} is an apocalyptic number.

91255465798378 is a deficient number, since it is larger than the sum of its proper divisors (73108220704022).

91255465798378 is a wasteful number, since it uses less digits than its factorization.

91255465798378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11844.

The product of its digits is 4572288000, while the sum is 79.

The spelling of 91255465798378 in words is "ninety-one trillion, two hundred fifty-five billion, four hundred sixty-five million, seven hundred ninety-eight thousand, three hundred seventy-eight".