151561764 has 18 divisors (see below), whose sum is σ = 383114550. Its totient is φ = 50520576.

The previous prime is 151561763. The next prime is 151561811. The reversal of 151561764 is 467165151.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 13264164 = 11760^2 + 3642^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4210049 = 151561764 / (1 + 5 + 1 + 5 + 6 + 1 + 7 + 6 + 4).

It is not an unprimeable number, because it can be changed into a prime (151561763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2104989 + ... + 2105060.

Almost surely, 2^151561764 is an apocalyptic number.

It is an amenable number.

151561764 is an abundant number, since it is smaller than the sum of its proper divisors (231552786).

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

151561764 is a wasteful number, since it uses less digits than its factorization.

151561764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210059 (or 4210054 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 151561764 is about 12311.0423604177. The cubic root of 151561764 is about 533.1669458395.

The spelling of 151561764 in words is "one hundred fifty-one million, five hundred sixty-one thousand, seven hundred sixty-four".