61122090852 has 18 divisors (see below), whose sum is σ = 154503063078. Its totient is φ = 20374030272.

The previous prime is 61122090817. The next prime is 61122090857. The reversal of 61122090852 is 25809022116.

61122090852 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., 42104577636 + 19017513216 = 205194^2 + 137904^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1697835857 = 61122090852 / (6 + 1 + 1 + 2 + 2 + 0 + 9 + 0 + 8 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (61122090857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 848917893 + ... + 848917964.

Almost surely, 2^61122090852 is an apocalyptic number.

It is an amenable number.

61122090852 is an abundant number, since it is smaller than the sum of its proper divisors (93380972226).

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

61122090852 is a wasteful number, since it uses less digits than its factorization.

61122090852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697835867 (or 1697835862 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 61122090852 in words is "sixty-one billion, one hundred twenty-two million, ninety thousand, eight hundred fifty-two".