91003497453447 has 16 divisors (see below), whose sum is σ = 121374984806400. Its totient is φ = 60650506677600.

The previous prime is 91003497453419. The next prime is 91003497453487. The reversal of 91003497453447 is 74435479430019.

It is a happy number.

It is not a de Polignac number, because 91003497453447 - 2¹² = 91003497449351 is a prime.

It is a super-2 number, since 2×91003497453447² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91003497453487) 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 15 ways as a sum of consecutive naturals, for example, 150410797 + ... + 151014617.

It is an arithmetic number, because the mean of its divisors is an integer number (7585936550400).

Almost surely, 2^{91003497453447} is an apocalyptic number.

91003497453447 is a deficient number, since it is larger than the sum of its proper divisors (30371487352953).

91003497453447 is a wasteful number, since it uses less digits than its factorization.

91003497453447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619054.

The product of its (nonzero) digits is 45722880, while the sum is 60.

The spelling of 91003497453447 in words is "ninety-one trillion, three billion, four hundred ninety-seven million, four hundred fifty-three thousand, four hundred forty-seven".