6511951425 has 48 divisors (see below), whose sum is σ = 12312069120. Its totient is φ = 2975058240.

The previous prime is 6511951423. The next prime is 6511951471. The reversal of 6511951425 is 5241591156.

It is not a de Polignac number, because 6511951425 - 2¹ = 6511951423 is a prime.

It is a super-2 number, since 2×6511951425² = 84811022723119061250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6511951423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1225324 + ... + 1230626.

It is an arithmetic number, because the mean of its divisors is an integer number (256501440).

Almost surely, 2^6511951425 is an apocalyptic number.

It is an amenable number.

6511951425 is a deficient number, since it is larger than the sum of its proper divisors (5800117695).

6511951425 is a wasteful number, since it uses less digits than its factorization.

6511951425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662 (or 7657 counting only the distinct ones).

The product of its digits is 54000, while the sum is 39.

The square root of 6511951425 is about 80696.6630350971. The cubic root of 6511951425 is about 1867.3986941671.

The spelling of 6511951425 in words is "six billion, five hundred eleven million, nine hundred fifty-one thousand, four hundred twenty-five".