615561217007 has 8 divisors (see below), whose sum is σ = 671908839120. Its totient is φ = 559278180160.

The previous prime is 615561216997. The next prime is 615561217039. The reversal of 615561217007 is 700712165516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615561217007 is a prime.

It is a super-2 number, since 2×615561217007² (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 (615561211007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16126382 + ... + 16164507.

It is an arithmetic number, because the mean of its divisors is an integer number (83988604890).

Almost surely, 2^615561217007 is an apocalyptic number.

615561217007 is a deficient number, since it is larger than the sum of its proper divisors (56347622113).

615561217007 is a wasteful number, since it uses less digits than its factorization.

615561217007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32292633.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 615561217007 in words is "six hundred fifteen billion, five hundred sixty-one million, two hundred seventeen thousand, seven".