61690356 has 96 divisors (see below), whose sum is σ = 196878080. Its totient is φ = 16267392.

The previous prime is 61690339. The next prime is 61690373. The reversal of 61690356 is 65309616.

61690356 is a `hidden beast` number, since 616 + 9 + 0 + 35 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (61690339) and next prime (61690373).

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

It is a self number, because there is not a number n which added to its sum of digits gives 61690356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6690 + ... + 12966.

Almost surely, 2^61690356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61690356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98439040).

61690356 is an abundant number, since it is smaller than the sum of its proper divisors (135187724).

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

61690356 is a wasteful number, since it uses less digits than its factorization.

61690356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310 (or 6302 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 61690356 is about 7854.3208490614. The cubic root of 61690356 is about 395.1291699541.

The spelling of 61690356 in words is "sixty-one million, six hundred ninety thousand, three hundred fifty-six".