61251378716 has 48 divisors (see below), whose sum is σ = 120282527232. Its totient is φ = 27046728000.

The previous prime is 61251378707. The next prime is 61251378719. The reversal of 61251378716 is 61787315216.

It is a super-2 number, since 2×61251378716² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61251378719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024241 + ... + 1082391.

It is an arithmetic number, because the mean of its divisors is an integer number (2505885984).

Almost surely, 2^61251378716 is an apocalyptic number.

It is an amenable number.

61251378716 is a deficient number, since it is larger than the sum of its proper divisors (59031148516).

61251378716 is a wasteful number, since it uses less digits than its factorization.

61251378716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58850 (or 58848 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The spelling of 61251378716 in words is "sixty-one billion, two hundred fifty-one million, three hundred seventy-eight thousand, seven hundred sixteen".