1155615500061 has 48 divisors (see below), whose sum is σ = 1870437890880. Its totient is φ = 681351989760.

The previous prime is 1155615499981. The next prime is 1155615500101. The reversal of 1155615500061 is 1600055165511.

It is a happy number.

It is not a de Polignac number, because 1155615500061 - 2¹⁹ = 1155614975773 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1155615499989 and 1155615500025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155615500861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34924821 + ... + 34957893.

It is an arithmetic number, because the mean of its divisors is an integer number (38967456060).

Almost surely, 2^{1155615500061} is an apocalyptic number.

1155615500061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155615500061 is a deficient number, since it is larger than the sum of its proper divisors (714822390819).

1155615500061 is a wasteful number, since it uses less digits than its factorization.

1155615500061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42666 (or 42663 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 1155615500061 in words is "one trillion, one hundred fifty-five billion, six hundred fifteen million, five hundred thousand, sixty-one".