1211768396136 has 40 divisors (see below), whose sum is σ = 3394073518770. Its totient is φ = 403922798496.

The previous prime is 1211768396107. The next prime is 1211768396213. The reversal of 1211768396136 is 6316938671121.

1211768396136 is a `hidden beast` number, since 1 + 2 + 1 + 17 + 6 + 8 + 3 + 9 + 613 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 704582287236 + 507186108900 = 839394^2 + 712170^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 935005831 + ... + 935007126.

Almost surely, 2^{1211768396136} is an apocalyptic number.

It is an amenable number.

1211768396136 is an abundant number, since it is smaller than the sum of its proper divisors (2182305122634).

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

1211768396136 is a wasteful number, since it uses less digits than its factorization.

1211768396136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870012975 (or 1870012962 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 1211768396136 in words is "one trillion, two hundred eleven billion, seven hundred sixty-eight million, three hundred ninety-six thousand, one hundred thirty-six".