91000454642 has 32 divisors (see below), whose sum is σ = 140161190400. Its totient is φ = 44290991808.

The previous prime is 91000454641. The next prime is 91000454653. The reversal of 91000454642 is 24645400019.

It is not an unprimeable number, because it can be changed into a prime (91000454641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29553659 + ... + 29556737.

It is an arithmetic number, because the mean of its divisors is an integer number (4380037200).

Almost surely, 2^91000454642 is an apocalyptic number.

91000454642 is a deficient number, since it is larger than the sum of its proper divisors (49160735758).

91000454642 is a wasteful number, since it uses less digits than its factorization.

91000454642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 91000454642 in words is "ninety-one billion, four hundred fifty-four thousand, six hundred forty-two".