61375816 has 8 divisors (see below), whose sum is σ = 115079670. Its totient is φ = 30687904.

The previous prime is 61375813. The next prime is 61375823. The reversal of 61375816 is 61857316.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 1313316 = 7750^2 + 1146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (61375813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3835981 + ... + 3835996.

Almost surely, 2^61375816 is an apocalyptic number.

It is an amenable number.

61375816 is a deficient number, since it is larger than the sum of its proper divisors (53703854).

61375816 is a wasteful number, since it uses less digits than its factorization.

61375816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7671983 (or 7671979 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 61375816 is about 7834.2718870358. The cubic root of 61375816 is about 394.4564783268.

The spelling of 61375816 in words is "sixty-one million, three hundred seventy-five thousand, eight hundred sixteen".