61523670 has 64 divisors (see below), whose sum is σ = 161267904. Its totient is φ = 14929920.

The previous prime is 61523659. The next prime is 61523681. The reversal of 61523670 is 7632516.

It is an interprime number because it is at equal distance from previous prime (61523659) and next prime (61523681).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 27390 + ... + 29550.

It is an arithmetic number, because the mean of its divisors is an integer number (2519811).

Almost surely, 2^61523670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61523670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80633952).

61523670 is an abundant number, since it is smaller than the sum of its proper divisors (99744234).

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

61523670 is a wasteful number, since it uses less digits than its factorization.

61523670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 61523670 is about 7843.7025695777. The cubic root of 61523670 is about 394.7729721409.

The spelling of 61523670 in words is "sixty-one million, five hundred twenty-three thousand, six hundred seventy".