1211546164056 has 32 divisors (see below), whose sum is σ = 3074072360640. Its totient is φ = 397821127968.

The previous prime is 1211546164043. The next prime is 1211546164069. The reversal of 1211546164056 is 6504616451121.

It is an interprime number because it is at equal distance from previous prime (1211546164043) and next prime (1211546164069).

It is a super-2 number, since 2×1211546164056² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211546163999 and 1211546164017.

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, 376722946 + ... + 376726161.

It is an arithmetic number, because the mean of its divisors is an integer number (96064761270).

Almost surely, 2^{1211546164056} is an apocalyptic number.

It is an amenable number.

1211546164056 is an abundant number, since it is smaller than the sum of its proper divisors (1862526196584).

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

1211546164056 is a wasteful number, since it uses less digits than its factorization.

1211546164056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753449183 (or 753449179 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 1211546164056 in words is "one trillion, two hundred eleven billion, five hundred forty-six million, one hundred sixty-four thousand, fifty-six".