7629061991 has 4 divisors (see below), whose sum is σ = 7667788392. Its totient is φ = 7590335592.

The previous prime is 7629061903. The next prime is 7629062009. The reversal of 7629061991 is 1991609267.

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 7629061991 - 2¹⁸ = 7628799847 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 (7629061691) 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, 19362905 + ... + 19363298.

It is an arithmetic number, because the mean of its divisors is an integer number (1916947098).

Almost surely, 2^7629061991 is an apocalyptic number.

7629061991 is a deficient number, since it is larger than the sum of its proper divisors (38726401).

7629061991 is a wasteful number, since it uses less digits than its factorization.

7629061991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38726400.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 7629061991 is about 87344.5017788756. The cubic root of 7629061991 is about 1968.5980380553.

The spelling of 7629061991 in words is "seven billion, six hundred twenty-nine million, sixty-one thousand, nine hundred ninety-one".