61711308528 has 20 divisors (see below), whose sum is σ = 159420880488. Its totient is φ = 20570436160.

The previous prime is 61711308517. The next prime is 61711308557. The reversal of 61711308528 is 82580311716.

It is a self number, because there is not a number n which added to its sum of digits gives 61711308528.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642826083 + ... + 642826178.

Almost surely, 2^61711308528 is an apocalyptic number.

It is an amenable number.

61711308528 is an abundant number, since it is smaller than the sum of its proper divisors (97709571960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61711308528 is a wasteful number, since it uses less digits than its factorization.

61711308528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285652272 (or 1285652266 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 61711308528 in words is "sixty-one billion, seven hundred eleven million, three hundred eight thousand, five hundred twenty-eight".