7491504161 has 8 divisors (see below), whose sum is σ = 7733568480. Its totient is φ = 7252523712.

The previous prime is 7491504157. The next prime is 7491504169. The reversal of 7491504161 is 1614051947.

It is a happy number.

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 7491504161 - 2² = 7491504157 is a prime.

It is a super-2 number, since 2×7491504161² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7491504169) 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, 766031 + ... + 775748.

It is an arithmetic number, because the mean of its divisors is an integer number (966696060).

Almost surely, 2^7491504161 is an apocalyptic number.

It is an amenable number.

7491504161 is a deficient number, since it is larger than the sum of its proper divisors (242064319).

7491504161 is a wasteful number, since it uses less digits than its factorization.

7491504161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541935.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 7491504161 is about 86553.4757303252. The cubic root of 7491504161 is about 1956.6944283208.

The spelling of 7491504161 in words is "seven billion, four hundred ninety-one million, five hundred four thousand, one hundred sixty-one".