259642051518 has 16 divisors (see below), whose sum is σ = 549830226960. Its totient is φ = 81456329856.

The previous prime is 259642051507. The next prime is 259642051541. The reversal of 259642051518 is 815150246952.

It is a super-2 number, since 2×259642051518² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272755053 + ... + 1272755256.

It is an arithmetic number, because the mean of its divisors is an integer number (34364389185).

Almost surely, 2^259642051518 is an apocalyptic number.

259642051518 is an abundant number, since it is smaller than the sum of its proper divisors (290188175442).

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

259642051518 is a wasteful number, since it uses less digits than its factorization.

259642051518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545510331.

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 259642051518 in words is "two hundred fifty-nine billion, six hundred forty-two million, fifty-one thousand, five hundred eighteen".