61546757421 has 8 divisors (see below), whose sum is σ = 82233665280. Its totient is φ = 40945510592.

The previous prime is 61546757417. The next prime is 61546757477. The reversal of 61546757421 is 12475764516.

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 61546757421 - 2² = 61546757417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61546707421) 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, 21413580 + ... + 21416453.

It is an arithmetic number, because the mean of its divisors is an integer number (10279208160).

Almost surely, 2^61546757421 is an apocalyptic number.

It is an amenable number.

61546757421 is a deficient number, since it is larger than the sum of its proper divisors (20686907859).

61546757421 is a wasteful number, since it uses less digits than its factorization.

61546757421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42830515.

The product of its digits is 1411200, while the sum is 48.

The spelling of 61546757421 in words is "sixty-one billion, five hundred forty-six million, seven hundred fifty-seven thousand, four hundred twenty-one".