1611033978 has 48 divisors (see below), whose sum is σ = 3510418176. Its totient is φ = 492315840.

The previous prime is 1611033953. The next prime is 1611033979. The reversal of 1611033978 is 8793301161.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1611033979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55150 + ... + 79142.

It is an arithmetic number, because the mean of its divisors is an integer number (73133712).

Almost surely, 2^1611033978 is an apocalyptic number.

1611033978 is an abundant number, since it is smaller than the sum of its proper divisors (1899384198).

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

1611033978 is a wasteful number, since it uses less digits than its factorization.

1611033978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24067 (or 24048 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1611033978 is about 40137.6877510402. The cubic root of 1611033978 is about 1172.2895673318.

The spelling of 1611033978 in words is "one billion, six hundred eleven million, thirty-three thousand, nine hundred seventy-eight".