7151920817 has 4 divisors (see below), whose sum is σ = 7462873920. Its totient is φ = 6840967716.

The previous prime is 7151920801. The next prime is 7151920819. The reversal of 7151920817 is 7180291517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7151920817 - 2⁴ = 7151920801 is a prime.

It is a super-2 number, since 2×7151920817² (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 (7151920819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155476517 + ... + 155476562.

It is an arithmetic number, because the mean of its divisors is an integer number (1865718480).

Almost surely, 2^7151920817 is an apocalyptic number.

It is an amenable number.

7151920817 is a deficient number, since it is larger than the sum of its proper divisors (310953103).

7151920817 is a wasteful number, since it uses less digits than its factorization.

7151920817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310953102.

The product of its (nonzero) digits is 35280, while the sum is 41.

The square root of 7151920817 is about 84569.0298927450. The cubic root of 7151920817 is about 1926.6710237081.

The spelling of 7151920817 in words is "seven billion, one hundred fifty-one million, nine hundred twenty thousand, eight hundred seventeen".