75151980 has 36 divisors (see below), whose sum is σ = 227961552. Its totient is φ = 20040480.

The previous prime is 75151931. The next prime is 75151981. The reversal of 75151980 is 8915157.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×75151980³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (75151981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208576 + ... + 208935.

Almost surely, 2^75151980 is an apocalyptic number.

It is an amenable number.

75151980 is an abundant number, since it is smaller than the sum of its proper divisors (152809572).

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

75151980 is a wasteful number, since it uses less digits than its factorization.

75151980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417526 (or 417521 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 75151980 is about 8669.0241665369. The cubic root of 75151980 is about 422.0009957824. Note that the first 3 decimals are identical.

The spelling of 75151980 in words is "seventy-five million, one hundred fifty-one thousand, nine hundred eighty".