6540625464 has 16 divisors (see below), whose sum is σ = 16351563720. Its totient is φ = 2180208480.

The previous prime is 6540625463. The next prime is 6540625501. The reversal of 6540625464 is 4645260456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540625463) 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, 136263007 + ... + 136263054.

Almost surely, 2^6540625464 is an apocalyptic number.

It is an amenable number.

6540625464 is an abundant number, since it is smaller than the sum of its proper divisors (9810938256).

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

6540625464 is a wasteful number, since it uses less digits than its factorization.

6540625464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272526070 (or 272526066 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The square root of 6540625464 is about 80874.1334667643. The cubic root of 6540625464 is about 1870.1355830278.

It can be divided in two parts, 654062 and 5464, that added together give a triangular number (659526 = T₁₁₄₈).

The spelling of 6540625464 in words is "six billion, five hundred forty million, six hundred twenty-five thousand, four hundred sixty-four".