1216690623390 has 64 divisors (see below), whose sum is σ = 3372900652800. Its totient is φ = 277604989440.

The previous prime is 1216690623389. The next prime is 1216690623397. The reversal of 1216690623390 is 933260966121.

It is a super-3 number, since 3×1216690623390³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216690623397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108433840 + ... + 108445059.

It is an arithmetic number, because the mean of its divisors is an integer number (52701572700).

Almost surely, 2^{1216690623390} is an apocalyptic number.

1216690623390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216690623390 is an abundant number, since it is smaller than the sum of its proper divisors (2156210029410).

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

1216690623390 is a wasteful number, since it uses less digits than its factorization.

1216690623390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216878937.

The product of its (nonzero) digits is 629856, while the sum is 48.

The spelling of 1216690623390 in words is "one trillion, two hundred sixteen billion, six hundred ninety million, six hundred twenty-three thousand, three hundred ninety".