7491896064 has 216 divisors, whose sum is σ = 22686535872. Its totient is φ = 2465510400.

The previous prime is 7491896003. The next prime is 7491896131. The reversal of 7491896064 is 4606981947.

7491896064 is a `hidden beast` number, since 7 + 491 + 8 + 96 + 0 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

It is a super-2 number, since 2×7491896064² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 7491896064.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5162539 + ... + 5163989.

Almost surely, 2^7491896064 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 7491896064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11343267936).

7491896064 is an abundant number, since it is smaller than the sum of its proper divisors (15194639808).

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

7491896064 is an equidigital number, since it uses as much as digits as its factorization.

7491896064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1539 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 7491896064 is about 86555.7396363754. The cubic root of 7491896064 is about 1956.7285479060.

The spelling of 7491896064 in words is "seven billion, four hundred ninety-one million, eight hundred ninety-six thousand, sixty-four".