1216377054 has 32 divisors (see below), whose sum is σ = 2705088000. Its totient is φ = 405154872.

The previous prime is 1216377031. The next prime is 1216377059. The reversal of 1216377054 is 4507736121.

It is a happy number.

1216377054 is a `hidden beast` number, since 12 + 1 + 637 + 7 + 0 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216377059) 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, 71067 + ... + 86505.

It is an arithmetic number, because the mean of its divisors is an integer number (84534000).

Almost surely, 2^1216377054 is an apocalyptic number.

1216377054 is an abundant number, since it is smaller than the sum of its proper divisors (1488710946).

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

1216377054 is a wasteful number, since it uses less digits than its factorization.

1216377054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16909 (or 16903 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1216377054 is about 34876.5975117987. The cubic root of 1216377054 is about 1067.4709695261.

The spelling of 1216377054 in words is "one billion, two hundred sixteen million, three hundred seventy-seven thousand, fifty-four".