7758137442 has 128 divisors (see below), whose sum is σ = 18240380928. Its totient is φ = 2173824000.

The previous prime is 7758137423. The next prime is 7758137477. The reversal of 7758137442 is 2447318577.

It is a junction number, because it is equal to n+sod(n) for n = 7758137391 and 7758137400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25270653 + ... + 25270959.

It is an arithmetic number, because the mean of its divisors is an integer number (142502976).

Almost surely, 2^7758137442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7758137442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9120190464).

7758137442 is an abundant number, since it is smaller than the sum of its proper divisors (10482243486).

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

7758137442 is a wasteful number, since it uses less digits than its factorization.

7758137442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 1317120, while the sum is 48.

The square root of 7758137442 is about 88080.2897474798. The cubic root of 7758137442 is about 1979.6381886591.

The spelling of 7758137442 in words is "seven billion, seven hundred fifty-eight million, one hundred thirty-seven thousand, four hundred forty-two".