7653138991 has 6 divisors (see below), whose sum is σ = 8077135992. Its totient is φ = 7250341860.

The previous prime is 7653138973. The next prime is 7653139037. The reversal of 7653138991 is 1998313567.

It is a happy number.

It is not a de Polignac number, because 7653138991 - 2⁵ = 7653138959 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 (7653138901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10599555 + ... + 10600276.

It is an arithmetic number, because the mean of its divisors is an integer number (1346189332).

Almost surely, 2^7653138991 is an apocalyptic number.

7653138991 is a deficient number, since it is larger than the sum of its proper divisors (423997001).

7653138991 is a wasteful number, since it uses less digits than its factorization.

7653138991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21199869 (or 21199850 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 52.

The square root of 7653138991 is about 87482.2209994694. The cubic root of 7653138991 is about 1970.6668009121. Note that the first 3 decimals are identical.

The spelling of 7653138991 in words is "seven billion, six hundred fifty-three million, one hundred thirty-eight thousand, nine hundred ninety-one".