61486537920 has 56 divisors (see below), whose sum is σ = 195219760944. Its totient is φ = 16396409856.

The previous prime is 61486537867. The next prime is 61486537927. The reversal of 61486537920 is 2973568416.

It is not an unprimeable number, because it can be changed into a prime (61486537927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32023279 + ... + 32025198.

It is a 1-persistent number, because it is pandigital, but 2⋅61486537920 = 122973075840 is not.

Almost surely, 2^61486537920 is an apocalyptic number.

61486537920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61486537920 is an abundant number, since it is smaller than the sum of its proper divisors (133733223024).

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

61486537920 is a wasteful number, since it uses less digits than its factorization.

61486537920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64048497 (or 64048487 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 61486537920 in words is "sixty-one billion, four hundred eighty-six million, five hundred thirty-seven thousand, nine hundred twenty".