7561781382 has 32 divisors (see below), whose sum is σ = 15259394304. Its totient is φ = 2498007200.

The previous prime is 7561781377. The next prime is 7561781389. The reversal of 7561781382 is 2831871657.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7561781389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620407 + ... + 632477.

It is an arithmetic number, because the mean of its divisors is an integer number (476856072).

Almost surely, 2^7561781382 is an apocalyptic number.

7561781382 is an abundant number, since it is smaller than the sum of its proper divisors (7697612922).

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

7561781382 is a wasteful number, since it uses less digits than its factorization.

7561781382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13004.

The product of its digits is 564480, while the sum is 48.

The square root of 7561781382 is about 86958.5037934761. The cubic root of 7561781382 is about 1962.7939279393.

The spelling of 7561781382 in words is "seven billion, five hundred sixty-one million, seven hundred eighty-one thousand, three hundred eighty-two".