61407145780 has 12 divisors (see below), whose sum is σ = 128955006180. Its totient is φ = 24562858304.

The previous prime is 61407145727. The next prime is 61407145853. The reversal of 61407145780 is 8754170416.

61407145780 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 2 ways, for example, as 14129601424 + 47277544356 = 118868^2 + 217434^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535178625 + ... + 1535178664.

It is an arithmetic number, because the mean of its divisors is an integer number (10746250515).

Almost surely, 2^61407145780 is an apocalyptic number.

It is an amenable number.

61407145780 is an abundant number, since it is smaller than the sum of its proper divisors (67547860400).

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

61407145780 is a wasteful number, since it uses less digits than its factorization.

61407145780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070357298 (or 3070357296 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The spelling of 61407145780 in words is "sixty-one billion, four hundred seven million, one hundred forty-five thousand, seven hundred eighty".