1515665660061 has 32 divisors (see below), whose sum is σ = 2445519098880. Its totient is φ = 815122803456.

The previous prime is 1515665660053. The next prime is 1515665660081. The reversal of 1515665660061 is 1600665665151.

It is not a de Polignac number, because 1515665660061 - 2³ = 1515665660053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1515665660081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21294150 + ... + 21365208.

It is an arithmetic number, because the mean of its divisors is an integer number (76422471840).

Almost surely, 2^{1515665660061} is an apocalyptic number.

It is an amenable number.

1515665660061 is a deficient number, since it is larger than the sum of its proper divisors (929853438819).

1515665660061 is a wasteful number, since it uses less digits than its factorization.

1515665660061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130833.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 1515665660061 in words is "one trillion, five hundred fifteen billion, six hundred sixty-five million, six hundred sixty thousand, sixty-one".