61212733919 has 8 divisors (see below), whose sum is σ = 61510630608. Its totient is φ = 60915496960.

The previous prime is 61212733913. The next prime is 61212733931. The reversal of 61212733919 is 91933721216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61212733919 - 2²⁸ = 60944298463 is a prime.

It is a super-2 number, since 2×61212733919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61212733919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61212733913) 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, 21599 + ... + 350559.

It is an arithmetic number, because the mean of its divisors is an integer number (7688828826).

Almost surely, 2^61212733919 is an apocalyptic number.

61212733919 is a deficient number, since it is larger than the sum of its proper divisors (297896689).

61212733919 is a wasteful number, since it uses less digits than its factorization.

61212733919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329865.

The product of its digits is 122472, while the sum is 44.

The spelling of 61212733919 in words is "sixty-one billion, two hundred twelve million, seven hundred thirty-three thousand, nine hundred nineteen".