91934778001 has 4 divisors (see below), whose sum is σ = 100292485104. Its totient is φ = 83577070900.

The previous prime is 91934777983. The next prime is 91934778037. The reversal of 91934778001 is 10087743919.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91934778001 - 2²³ = 91926389393 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91934778041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4178853535 + ... + 4178853556.

It is an arithmetic number, because the mean of its divisors is an integer number (25073121276).

Almost surely, 2^91934778001 is an apocalyptic number.

It is an amenable number.

91934778001 is a deficient number, since it is larger than the sum of its proper divisors (8357707103).

91934778001 is a wasteful number, since it uses less digits than its factorization.

91934778001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357707102.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 91934778001 in words is "ninety-one billion, nine hundred thirty-four million, seven hundred seventy-eight thousand, one".