61502061511 has 16 divisors (see below), whose sum is σ = 67971640320. Its totient is φ = 55181206080.

The previous prime is 61502061499. The next prime is 61502061529. The reversal of 61502061511 is 11516020516.

It is a happy number.

It is not a de Polignac number, because 61502061511 - 2²¹ = 61499964359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61502061511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61502061581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478090 + ... + 592936.

It is an arithmetic number, because the mean of its divisors is an integer number (4248227520).

Almost surely, 2^61502061511 is an apocalyptic number.

61502061511 is a deficient number, since it is larger than the sum of its proper divisors (6469578809).

61502061511 is a wasteful number, since it uses less digits than its factorization.

61502061511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115494.

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 61502061511 in words is "sixty-one billion, five hundred two million, sixty-one thousand, five hundred eleven".