61960915575 has 240 divisors, whose sum is σ = 127767822336. Its totient is φ = 29491257600.

The previous prime is 61960915537. The next prime is 61960915651. The reversal of 61960915575 is 57551906916.

61960915575 is a `hidden beast` number, since 6 + 1 + 9 + 60 + 9 + 1 + 5 + 575 = 666.

It is not a de Polignac number, because 61960915575 - 2⁹ = 61960915063 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 143760610 + ... + 143761040.

Almost surely, 2^61960915575 is an apocalyptic number.

61960915575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61960915575 is an abundant number, since it is smaller than the sum of its proper divisors (65806906761).

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

61960915575 is a wasteful number, since it uses less digits than its factorization.

61960915575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 2551500, while the sum is 54.

The spelling of 61960915575 in words is "sixty-one billion, nine hundred sixty million, nine hundred fifteen thousand, five hundred seventy-five".