656227156557 has 8 divisors (see below), whose sum is σ = 999965190976. Its totient is φ = 374986946592.

The previous prime is 656227156547. The next prime is 656227156567. The reversal of 656227156557 is 755651722656.

It is an interprime number because it is at equal distance from previous prime (656227156547) and next prime (656227156567).

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

It is not a de Polignac number, because 656227156557 - 2¹⁰ = 656227155533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656227156497 and 656227156506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656227156547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15624456088 + ... + 15624456129.

It is an arithmetic number, because the mean of its divisors is an integer number (124995648872).

Almost surely, 2^656227156557 is an apocalyptic number.

It is an amenable number.

656227156557 is a deficient number, since it is larger than the sum of its proper divisors (343738034419).

656227156557 is a wasteful number, since it uses less digits than its factorization.

656227156557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31248912227.

The product of its digits is 26460000, while the sum is 57.

The spelling of 656227156557 in words is "six hundred fifty-six billion, two hundred twenty-seven million, one hundred fifty-six thousand, five hundred fifty-seven".