7642360991 has 4 divisors (see below), whose sum is σ = 7646316552. Its totient is φ = 7638405432.

The previous prime is 7642360939. The next prime is 7642361003. The reversal of 7642360991 is 1990632467.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7642360991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7642360391) 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, 1974881 + ... + 1978746.

It is an arithmetic number, because the mean of its divisors is an integer number (1911579138).

Almost surely, 2^7642360991 is an apocalyptic number.

7642360991 is a deficient number, since it is larger than the sum of its proper divisors (3955561).

7642360991 is a wasteful number, since it uses less digits than its factorization.

7642360991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955560.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 7642360991 is about 87420.5982077451. The cubic root of 7642360991 is about 1969.7412623680.

The spelling of 7642360991 in words is "seven billion, six hundred forty-two million, three hundred sixty thousand, nine hundred ninety-one".