61215562611011 has 4 divisors (see below), whose sum is σ = 64437434327400. Its totient is φ = 57993690894624.

The previous prime is 61215562610989. The next prime is 61215562611023. The reversal of 61215562611011 is 11011626551216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61215562611011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61215562611211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610935858166 + ... + 1610935858203.

It is an arithmetic number, because the mean of its divisors is an integer number (16109358581850).

Almost surely, 2^{61215562611011} is an apocalyptic number.

61215562611011 is a deficient number, since it is larger than the sum of its proper divisors (3221871716389).

61215562611011 is a wasteful number, since it uses less digits than its factorization.

61215562611011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221871716388.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 61215562611011 in words is "sixty-one trillion, two hundred fifteen billion, five hundred sixty-two million, six hundred eleven thousand, eleven".