91553105553501 has 32 divisors (see below), whose sum is σ = 122994061961728. Its totient is φ = 60575323668480.

The previous prime is 91553105553499. The next prime is 91553105553529. The reversal of 91553105553501 is 10535550135519.

It is not a de Polignac number, because 91553105553501 - 2¹ = 91553105553499 is a prime.

It is a super-2 number, since 2×91553105553501² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91553105553541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1619606700 + ... + 1619663226.

It is an arithmetic number, because the mean of its divisors is an integer number (3843564436304).

Almost surely, 2^{91553105553501} is an apocalyptic number.

It is an amenable number.

91553105553501 is a deficient number, since it is larger than the sum of its proper divisors (31440956408227).

91553105553501 is a wasteful number, since it uses less digits than its factorization.

91553105553501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63301.

The product of its (nonzero) digits is 1265625, while the sum is 48.

The spelling of 91553105553501 in words is "ninety-one trillion, five hundred fifty-three billion, one hundred five million, five hundred fifty-three thousand, five hundred one".