61012377145 has 4 divisors (see below), whose sum is σ = 73214852580. Its totient is φ = 48809901712.

The previous prime is 61012377091. The next prime is 61012377149. The reversal of 61012377145 is 54177321016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24339744144 + 36672633001 = 156012^2 + 191501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61012377145 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61012377149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6101237710 + ... + 6101237719.

It is an arithmetic number, because the mean of its divisors is an integer number (18303713145).

Almost surely, 2^61012377145 is an apocalyptic number.

It is an amenable number.

61012377145 is a deficient number, since it is larger than the sum of its proper divisors (12202475435).

61012377145 is a wasteful number, since it uses less digits than its factorization.

61012377145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12202475434.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 61012377145 in words is "sixty-one billion, twelve million, three hundred seventy-seven thousand, one hundred forty-five".