61489397970000 has 4800 divisors, whose sum is σ = 317240639299584. Its totient is φ = 11092930560000.

The previous prime is 61489397969981. The next prime is 61489397970041. The reversal of 61489397970000 is 7979398416.

61489397970000 is a `hidden beast` number, since 61 + 489 + 3 + 9 + 7 + 97 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 61489397970000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 959 ways as a sum of consecutive naturals, for example, 41351309257 + ... + 41351310743.

Almost surely, 2^{61489397970000} is an apocalyptic number.

61489397970000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61489397970000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158620319649792).

61489397970000 is an abundant number, since it is smaller than the sum of its proper divisors (255751241329584).

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

61489397970000 is a wasteful number, since it uses less digits than its factorization.

61489397970000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1545 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 61489397970000 in words is "sixty-one trillion, four hundred eighty-nine billion, three hundred ninety-seven million, nine hundred seventy thousand".