647770056541 has 8 divisors (see below), whose sum is σ = 685954094400. Its totient is φ = 609594898368.

The previous prime is 647770056503. The next prime is 647770056581. The reversal of 647770056541 is 145650077746.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 647770056541 - 2¹¹ = 647770054493 is a prime.

It is a super-2 number, since 2×647770056541² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647770056581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2069431 + ... + 2361796.

It is an arithmetic number, because the mean of its divisors is an integer number (85744261800).

Almost surely, 2^647770056541 is an apocalyptic number.

It is an amenable number.

647770056541 is a deficient number, since it is larger than the sum of its proper divisors (38184037859).

647770056541 is a wasteful number, since it uses less digits than its factorization.

647770056541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439843.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 647770056541 in words is "six hundred forty-seven billion, seven hundred seventy million, fifty-six thousand, five hundred forty-one".