61005156115 has 16 divisors (see below), whose sum is σ = 79161639552. Its totient is φ = 44955986944.

The previous prime is 61005156109. The next prime is 61005156143. The reversal of 61005156115 is 51165150016.

It is a cyclic number.

It is not a de Polignac number, because 61005156115 - 2¹³ = 61005147923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7631194 + ... + 7639183.

It is an arithmetic number, because the mean of its divisors is an integer number (4947602472).

Almost surely, 2^61005156115 is an apocalyptic number.

61005156115 is a deficient number, since it is larger than the sum of its proper divisors (18156483437).

61005156115 is a wasteful number, since it uses less digits than its factorization.

61005156115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15270446.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 61005156115 in words is "sixty-one billion, five million, one hundred fifty-six thousand, one hundred fifteen".