615691218012 has 48 divisors (see below), whose sum is σ = 1628548978560. Its totient is φ = 179472742848.

The previous prime is 615691218011. The next prime is 615691218047. The reversal of 615691218012 is 210812196516.

615691218012 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×615691218012² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615691218011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103858578 + ... + 103864505.

It is an arithmetic number, because the mean of its divisors is an integer number (33928103720).

Almost surely, 2^615691218012 is an apocalyptic number.

It is an amenable number.

615691218012 is an abundant number, since it is smaller than the sum of its proper divisors (1012857760548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

615691218012 is a wasteful number, since it uses less digits than its factorization.

615691218012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207723122 (or 207723120 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 615691218012 in words is "six hundred fifteen billion, six hundred ninety-one million, two hundred eighteen thousand, twelve".