61812788 has 6 divisors (see below), whose sum is σ = 108172386. Its totient is φ = 30906392.

The previous prime is 61812769. The next prime is 61812797. The reversal of 61812788 is 88721816.

61812788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 55771024 + 6041764 = 7468^2 + 2458^2 .

It is a super-3 number, since 3×61812788³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7726595 + ... + 7726602.

It is an arithmetic number, because the mean of its divisors is an integer number (18028731).

Almost surely, 2^61812788 is an apocalyptic number.

It is an amenable number.

61812788 is a deficient number, since it is larger than the sum of its proper divisors (46359598).

61812788 is a wasteful number, since it uses less digits than its factorization.

61812788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15453201 (or 15453199 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The square root of 61812788 is about 7862.1109124713. The cubic root of 61812788 is about 395.3903911559.

The spelling of 61812788 in words is "sixty-one million, eight hundred twelve thousand, seven hundred eighty-eight".