694180061 has 16 divisors (see below), whose sum is σ = 736546608. Its totient is φ = 653452800.

The previous prime is 694180049. The next prime is 694180103. The reversal of 694180061 is 160081496.

It can be written as a sum of positive squares in 8 ways, for example, as 49984900 + 644195161 = 7070^2 + 25381^2 .

It is a cyclic number.

It is not a de Polignac number, because 694180061 - 2²² = 689985757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694180001) 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, 129935 + ... + 135171.

It is an arithmetic number, because the mean of its divisors is an integer number (46034163).

Almost surely, 2^694180061 is an apocalyptic number.

694180061 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

694180061 is a deficient number, since it is larger than the sum of its proper divisors (42366547).

694180061 is a wasteful number, since it uses less digits than its factorization.

694180061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 694180061 is about 26347.2970340413. The cubic root of 694180061 is about 885.4364136546.

The spelling of 694180061 in words is "six hundred ninety-four million, one hundred eighty thousand, sixty-one".