61016555015 has 16 divisors (see below), whose sum is σ = 80339944608. Its totient is φ = 44208218496.

The previous prime is 61016555009. The next prime is 61016555053. The reversal of 61016555015 is 51055561016.

It is not a de Polignac number, because 61016555015 - 2²⁰ = 61015506439 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, 8852369 + ... + 8859258.

It is an arithmetic number, because the mean of its divisors is an integer number (5021246538).

Almost surely, 2^61016555015 is an apocalyptic number.

61016555015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61016555015 is a deficient number, since it is larger than the sum of its proper divisors (19323389593).

61016555015 is a wasteful number, since it uses less digits than its factorization.

61016555015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17711698.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 61016555015 in words is "sixty-one billion, sixteen million, five hundred fifty-five thousand, fifteen".