7791911628 has 96 divisors (see below), whose sum is σ = 19941949440. Its totient is φ = 2358745920.

The previous prime is 7791911623. The next prime is 7791911639. The reversal of 7791911628 is 8261191977.

It is a happy number.

It is a super-2 number, since 2×7791911628² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7791911623) 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, 751125 + ... + 761427.

It is an arithmetic number, because the mean of its divisors is an integer number (207728640).

Almost surely, 2^7791911628 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 7791911628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9970974720).

7791911628 is an abundant number, since it is smaller than the sum of its proper divisors (12150037812).

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

7791911628 is a wasteful number, since it uses less digits than its factorization.

7791911628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10467 (or 10465 counting only the distinct ones).

The product of its digits is 381024, while the sum is 51.

The square root of 7791911628 is about 88271.8053967404. The cubic root of 7791911628 is about 1982.5067413835.

The spelling of 7791911628 in words is "seven billion, seven hundred ninety-one million, nine hundred eleven thousand, six hundred twenty-eight".