151491780 has 72 divisors (see below), whose sum is σ = 501306624. Its totient is φ = 36724800.

The previous prime is 151491721. The next prime is 151491793. The reversal of 151491780 is 87194151.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36276 + ... + 40235.

It is an arithmetic number, because the mean of its divisors is an integer number (6962592).

Almost surely, 2^151491780 is an apocalyptic number.

151491780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151491780 is an abundant number, since it is smaller than the sum of its proper divisors (349814844).

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

151491780 is a wasteful number, since it uses less digits than its factorization.

151491780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76537 (or 76532 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 151491780 is about 12308.1997058871. The cubic root of 151491780 is about 533.0848695093.

The spelling of 151491780 in words is "one hundred fifty-one million, four hundred ninety-one thousand, seven hundred eighty".