70561764 has 216 divisors, whose sum is σ = 237896568. Its totient is φ = 17418240.

The previous prime is 70561741. The next prime is 70561793. The reversal of 70561764 is 46716507.

It can be written as a sum of positive squares in 4 ways, for example, as 1764 + 70560000 = 42^2 + 8400^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 389754 + ... + 389934.

It is an arithmetic number, because the mean of its divisors is an integer number (1101373).

Almost surely, 2^70561764 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 70561764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118948284).

70561764 is an abundant number, since it is smaller than the sum of its proper divisors (167334804).

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

70561764 is a wasteful number, since it uses less digits than its factorization.

70561764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 70561764 is about 8400.1049993438. The cubic root of 70561764 is about 413.2280651684.

It can be divided in two parts, 7056 and 1764, that multiplied together give a square (12446784 = 3528²).

The spelling of 70561764 in words is "seventy million, five hundred sixty-one thousand, seven hundred sixty-four".