7747542042 has 16 divisors (see below), whose sum is σ = 16168783680. Its totient is φ = 2470230752.

The previous prime is 7747542031. The next prime is 7747542053. The reversal of 7747542042 is 2402457477.

It is an interprime number because it is at equal distance from previous prime (7747542031) and next prime (7747542053).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7747541985 and 7747542003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28070667 + ... + 28070942.

It is an arithmetic number, because the mean of its divisors is an integer number (1010548980).

Almost surely, 2^7747542042 is an apocalyptic number.

7747542042 is an abundant number, since it is smaller than the sum of its proper divisors (8421241638).

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

7747542042 is a wasteful number, since it uses less digits than its factorization.

7747542042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56141637.

The product of its (nonzero) digits is 439040, while the sum is 42.

The square root of 7747542042 is about 88020.1229378828. The cubic root of 7747542042 is about 1978.7365712920.

The spelling of 7747542042 in words is "seven billion, seven hundred forty-seven million, five hundred forty-two thousand, forty-two".