212802455961 has 16 divisors (see below), whose sum is σ = 315272776000. Its totient is φ = 141863858784.

The previous prime is 212802455951. The next prime is 212802455977. The reversal of 212802455961 is 169554208212.

212802455961 is a `hidden beast` number, since 2 + 12 + 8 + 0 + 2 + 45 + 596 + 1 = 666.

It is not a de Polignac number, because 212802455961 - 2¹³ = 212802447769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212802455951) 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, 912090 + ... + 1121388.

It is an arithmetic number, because the mean of its divisors is an integer number (19704548500).

Almost surely, 2^212802455961 is an apocalyptic number.

It is an amenable number.

212802455961 is a deficient number, since it is larger than the sum of its proper divisors (102470320039).

212802455961 is a wasteful number, since it uses less digits than its factorization.

212802455961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246965 (or 246959 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 212802455961 in words is "two hundred twelve billion, eight hundred two million, four hundred fifty-five thousand, nine hundred sixty-one".