6521656134 has 16 divisors (see below), whose sum is σ = 14906642688. Its totient is φ = 1863330312.

The previous prime is 6521656133. The next prime is 6521656139. The reversal of 6521656134 is 4316561256.

It is a junction number, because it is equal to n+sod(n) for n = 6521656092 and 6521656101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521656133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77638722 + ... + 77638805.

It is an arithmetic number, because the mean of its divisors is an integer number (931665168).

Almost surely, 2^6521656134 is an apocalyptic number.

6521656134 is an abundant number, since it is smaller than the sum of its proper divisors (8384986554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521656134 is a wasteful number, since it uses less digits than its factorization.

6521656134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155277539.

The product of its digits is 129600, while the sum is 39.

The square root of 6521656134 is about 80756.7714436381. The cubic root of 6521656134 is about 1868.3258901561.

The spelling of 6521656134 in words is "six billion, five hundred twenty-one million, six hundred fifty-six thousand, one hundred thirty-four".