65140645015 has 16 divisors (see below), whose sum is σ = 78303757536. Its totient is φ = 52022608000.

The previous prime is 65140645007. The next prime is 65140645039. The reversal of 65140645015 is 51054604156.

It is not a de Polignac number, because 65140645015 - 2³ = 65140645007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8940564 + ... + 8947846.

It is an arithmetic number, because the mean of its divisors is an integer number (4893984846).

Almost surely, 2^65140645015 is an apocalyptic number.

65140645015 is a deficient number, since it is larger than the sum of its proper divisors (13163112521).

65140645015 is a wasteful number, since it uses less digits than its factorization.

65140645015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10130.

The product of its (nonzero) digits is 72000, while the sum is 37.

It can be divided in two parts, 651406450 and 15, that added together give a triangular number (651406465 = T₃₆₀₉₄).

The spelling of 65140645015 in words is "sixty-five billion, one hundred forty million, six hundred forty-five thousand, fifteen".