6148689991 has 2 divisors, whose sum is σ = 6148689992. Its totient is φ = 6148689990.

The previous prime is 6148689949. The next prime is 6148690039. The reversal of 6148689991 is 1999868416.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6148689991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6148689941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3074344995 + 3074344996.

It is an arithmetic number, because the mean of its divisors is an integer number (3074344996).

Almost surely, 2^6148689991 is an apocalyptic number.

6148689991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6148689991 is an equidigital number, since it uses as much as digits as its factorization.

6148689991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 61.

The square root of 6148689991 is about 78413.5829496395. The cubic root of 6148689991 is about 1832.0087024966.

The spelling of 6148689991 in words is "six billion, one hundred forty-eight million, six hundred eighty-nine thousand, nine hundred ninety-one".