1611321766380 has 48 divisors (see below), whose sum is σ = 5013001052640. Its totient is φ = 429685804224.

The previous prime is 1611321766363. The next prime is 1611321766409. The reversal of 1611321766380 is 836671231161.

1611321766380 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 3 + 2 + 1 + 7 + 6 + 638 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1491964059 + ... + 1491965138.

It is an arithmetic number, because the mean of its divisors is an integer number (104437521930).

Almost surely, 2^{1611321766380} is an apocalyptic number.

1611321766380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611321766380 is an abundant number, since it is smaller than the sum of its proper divisors (3401679286260).

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

1611321766380 is a wasteful number, since it uses less digits than its factorization.

1611321766380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983929215 (or 2983929207 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 1611321766380 in words is "one trillion, six hundred eleven billion, three hundred twenty-one million, seven hundred sixty-six thousand, three hundred eighty".