7744836642 has 16 divisors (see below), whose sum is σ = 16400830752. Its totient is φ = 2429752640.

The previous prime is 7744836637. The next prime is 7744836647. The reversal of 7744836642 is 2466384477.

It is an interprime number because it is at equal distance from previous prime (7744836637) and next prime (7744836647).

It is a super-2 number, since 2×7744836642² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (7744836647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37964784 + ... + 37964987.

It is an arithmetic number, because the mean of its divisors is an integer number (1025051922).

Almost surely, 2^7744836642 is an apocalyptic number.

7744836642 is an abundant number, since it is smaller than the sum of its proper divisors (8655994110).

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

7744836642 is a wasteful number, since it uses less digits than its factorization.

7744836642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75929793.

The product of its digits is 5419008, while the sum is 51.

The square root of 7744836642 is about 88004.7535193412. The cubic root of 7744836642 is about 1978.5062230894.

The spelling of 7744836642 in words is "seven billion, seven hundred forty-four million, eight hundred thirty-six thousand, six hundred forty-two".