122261693478 has 16 divisors (see below), whose sum is σ = 251132127600. Its totient is φ = 39652441056.

The previous prime is 122261693459. The next prime is 122261693479. The reversal of 122261693478 is 874396162221.

It is a self number, because there is not a number n which added to its sum of digits gives 122261693478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122261693479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275363953 + ... + 275364396.

It is an arithmetic number, because the mean of its divisors is an integer number (15695757975).

Almost surely, 2^122261693478 is an apocalyptic number.

122261693478 is an abundant number, since it is smaller than the sum of its proper divisors (128870434122).

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

122261693478 is a wasteful number, since it uses less digits than its factorization.

122261693478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550728391.

The product of its digits is 1741824, while the sum is 51.

The spelling of 122261693478 in words is "one hundred twenty-two billion, two hundred sixty-one million, six hundred ninety-three thousand, four hundred seventy-eight".