561618157748 has 12 divisors (see below), whose sum is σ = 989340596832. Its totient is φ = 278949415800.

The previous prime is 561618157741. The next prime is 561618157781. The reversal of 561618157748 is 847751816165.

It is a happy number.

It is a super-2 number, since 2×561618157748² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561618157741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464915090 + ... + 464916297.

It is an arithmetic number, because the mean of its divisors is an integer number (82445049736).

Almost surely, 2^561618157748 is an apocalyptic number.

It is an amenable number.

561618157748 is a deficient number, since it is larger than the sum of its proper divisors (427722439084).

561618157748 is a wasteful number, since it uses less digits than its factorization.

561618157748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929831542 (or 929831540 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 59.

The spelling of 561618157748 in words is "five hundred sixty-one billion, six hundred eighteen million, one hundred fifty-seven thousand, seven hundred forty-eight".