91603049472 has 352 divisors, whose sum is σ = 301583036160. Its totient is φ = 27229962240.

The previous prime is 91603049467. The next prime is 91603049477. The reversal of 91603049472 is 27494030619.

It is a happy number.

91603049472 is a `hidden beast` number, since 9 + 1 + 60 + 30 + 494 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (91603049467) and next prime (91603049477).

It is a tau number, because it is divible by the number of its divisors (352).

It is a super-2 number, since 2×91603049472² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91603049477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16115943 + ... + 16121625.

Almost surely, 2^91603049472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91603049472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150791518080).

91603049472 is an abundant number, since it is smaller than the sum of its proper divisors (209979986688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91603049472 is a wasteful number, since it uses less digits than its factorization.

91603049472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776 (or 5752 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 91603049472 in words is "ninety-one billion, six hundred three million, forty-nine thousand, four hundred seventy-two".