1215720616276 has 24 divisors (see below), whose sum is σ = 2268864984960. Its totient is φ = 567987960192.

The previous prime is 1215720616249. The next prime is 1215720616291. The reversal of 1215720616276 is 6726160275121.

It is a super-2 number, since 2×1215720616276² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64300780 + ... + 64319683.

It is an arithmetic number, because the mean of its divisors is an integer number (94536041040).

Almost surely, 2^{1215720616276} is an apocalyptic number.

It is an amenable number.

1215720616276 is a deficient number, since it is larger than the sum of its proper divisors (1053144368684).

1215720616276 is a wasteful number, since it uses less digits than its factorization.

1215720616276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128620623 (or 128620621 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 1215720616276 in words is "one trillion, two hundred fifteen billion, seven hundred twenty million, six hundred sixteen thousand, two hundred seventy-six".