6215536401556 has 12 divisors (see below), whose sum is σ = 10925105835168. Its totient is φ = 3094077591512.

The previous prime is 6215536401479. The next prime is 6215536401587. The reversal of 6215536401556 is 6551046355126.

It is a happy number.

It is a super-2 number, since 2×6215536401556² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3422651296 + ... + 3422653111.

It is an arithmetic number, because the mean of its divisors is an integer number (910425486264).

Almost surely, 2^{6215536401556} is an apocalyptic number.

It is an amenable number.

6215536401556 is a deficient number, since it is larger than the sum of its proper divisors (4709569433612).

6215536401556 is a wasteful number, since it uses less digits than its factorization.

6215536401556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845304638 (or 6845304636 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 6215536401556 in words is "six trillion, two hundred fifteen billion, five hundred thirty-six million, four hundred one thousand, five hundred fifty-six".