91542024646 has 4 divisors (see below), whose sum is σ = 137313036972. Its totient is φ = 45771012322.

The previous prime is 91542024641. The next prime is 91542024653. The reversal of 91542024646 is 64642024519.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91542024641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22885506160 + ... + 22885506163.

It is an arithmetic number, because the mean of its divisors is an integer number (34328259243).

Almost surely, 2^91542024646 is an apocalyptic number.

91542024646 is a deficient number, since it is larger than the sum of its proper divisors (45771012326).

91542024646 is a wasteful number, since it uses less digits than its factorization.

91542024646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45771012325.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 91542024646 in words is "ninety-one billion, five hundred forty-two million, twenty-four thousand, six hundred forty-six".