61946436505 has 16 divisors (see below), whose sum is σ = 74815360704. Its totient is φ = 49238418240.

The previous prime is 61946436499. The next prime is 61946436581. The reversal of 61946436505 is 50563464916.

It is not a de Polignac number, because 61946436505 - 2¹¹ = 61946434457 is a prime.

It is a super-3 number, since 3×61946436505³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421042 + ... + 548788.

It is an arithmetic number, because the mean of its divisors is an integer number (4675960044).

Almost surely, 2^61946436505 is an apocalyptic number.

It is an amenable number.

61946436505 is a deficient number, since it is larger than the sum of its proper divisors (12868924199).

61946436505 is a wasteful number, since it uses less digits than its factorization.

61946436505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128376.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 61946436505 in words is "sixty-one billion, nine hundred forty-six million, four hundred thirty-six thousand, five hundred five".