2631991362 has 128 divisors (see below), whose sum is σ = 7089223680. Its totient is φ = 629130240.

The previous prime is 2631991333. The next prime is 2631991441.

It is a happy number.

2631991362 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3561189 + ... + 3561927.

It is an arithmetic number, because the mean of its divisors is an integer number (55384560).

Almost surely, 2^2631991362 is an apocalyptic number.

2631991362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2631991362, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3544611840).

2631991362 is an abundant number, since it is smaller than the sum of its proper divisors (4457232318).

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

2631991362 is a wasteful number, since it uses less digits than its factorization.

2631991362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its digits is 104976, while the sum is 42.

The square root of 2631991362 is about 51302.9371673786. The cubic root of 2631991362 is about 1380.6856779456.

The spelling of 2631991362 in words is "two billion, six hundred thirty-one million, nine hundred ninety-one thousand, three hundred sixty-two".