1947495649585 has 16 divisors (see below), whose sum is σ = 2460975770880. Its totient is φ = 1476585443520.

The previous prime is 1947495649553. The next prime is 1947495649711. The reversal of 1947495649585 is 5859465947491.

It is not a de Polignac number, because 1947495649585 - 2⁵ = 1947495649553 is a prime.

It is a super-2 number, since 2×1947495649585² (a number of 25 digits) contains 22 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, 77669781 + ... + 77694850.

It is an arithmetic number, because the mean of its divisors is an integer number (153810985680).

Almost surely, 2^{1947495649585} is an apocalyptic number.

It is an amenable number.

1947495649585 is a deficient number, since it is larger than the sum of its proper divisors (513480121295).

1947495649585 is a wasteful number, since it uses less digits than its factorization.

1947495649585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155364768.

The product of its digits is 1959552000, while the sum is 76.

The spelling of 1947495649585 in words is "one trillion, nine hundred forty-seven billion, four hundred ninety-five million, six hundred forty-nine thousand, five hundred eighty-five".