7742031643 has 4 divisors (see below), whose sum is σ = 7746688768. Its totient is φ = 7737374520.

The previous prime is 7742031613. The next prime is 7742031677. The reversal of 7742031643 is 3461302477.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7742031643 - 2¹⁷ = 7741900571 is a prime.

It is a super-2 number, since 2×7742031643² (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 (7742031613) 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, 2326068 + ... + 2329393.

It is an arithmetic number, because the mean of its divisors is an integer number (1936672192).

Almost surely, 2^7742031643 is an apocalyptic number.

7742031643 is a deficient number, since it is larger than the sum of its proper divisors (4657125).

7742031643 is a wasteful number, since it uses less digits than its factorization.

7742031643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657124.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 7742031643 is about 87988.8154426459. The cubic root of 7742031643 is about 1978.2673379947.

The spelling of 7742031643 in words is "seven billion, seven hundred forty-two million, thirty-one thousand, six hundred forty-three".