61620178711 has 16 divisors (see below), whose sum is σ = 76908400128. Its totient is φ = 48067740000.

The previous prime is 61620178709. The next prime is 61620178717. The reversal of 61620178711 is 11787102616.

It is not a de Polignac number, because 61620178711 - 2¹ = 61620178709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620178717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4762165 + ... + 4775086.

It is an arithmetic number, because the mean of its divisors is an integer number (4806775008).

Almost surely, 2^61620178711 is an apocalyptic number.

61620178711 is a deficient number, since it is larger than the sum of its proper divisors (15288221417).

61620178711 is a wasteful number, since it uses less digits than its factorization.

61620178711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537342.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 61620178711 in words is "sixty-one billion, six hundred twenty million, one hundred seventy-eight thousand, seven hundred eleven".