61091514624 has 72 divisors (see below), whose sum is σ = 185820040000. Its totient is φ = 17454716928.

The previous prime is 61091514563. The next prime is 61091514661. The reversal of 61091514624 is 42641519016.

It is a super-3 number, since 3×61091514624³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5676499 + ... + 5687250.

Almost surely, 2^61091514624 is an apocalyptic number.

61091514624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61091514624 is an abundant number, since it is smaller than the sum of its proper divisors (124728525376).

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

61091514624 is a wasteful number, since it uses less digits than its factorization.

61091514624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363775 (or 11363761 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 61091514624 in words is "sixty-one billion, ninety-one million, five hundred fourteen thousand, six hundred twenty-four".