91521079141 has 8 divisors (see below), whose sum is σ = 93478008960. Its totient is φ = 89564552448.

The previous prime is 91521079121. The next prime is 91521079159. The reversal of 91521079141 is 14197012519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91521079141 - 2²¹ = 91518981989 is a prime.

It is a super-2 number, since 2×91521079141² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91521079094 and 91521079103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91521079121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382650 + ... + 573988.

It is an arithmetic number, because the mean of its divisors is an integer number (11684751120).

Almost surely, 2^91521079141 is an apocalyptic number.

It is an amenable number.

91521079141 is a deficient number, since it is larger than the sum of its proper divisors (1956929819).

91521079141 is a wasteful number, since it uses less digits than its factorization.

91521079141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201563.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 91521079141 in words is "ninety-one billion, five hundred twenty-one million, seventy-nine thousand, one hundred forty-one".