61657260293545 has 8 divisors (see below), whose sum is σ = 84558528402624. Its totient is φ = 42279264201264.

The previous prime is 61657260293537. The next prime is 61657260293617. The reversal of 61657260293545 is 54539206275616.

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 61657260293545 - 2³ = 61657260293537 is a prime.

It is a Duffinian number.

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, 880818004159 + ... + 880818004228.

It is an arithmetic number, because the mean of its divisors is an integer number (10569816050328).

Almost surely, 2^{61657260293545} is an apocalyptic number.

It is an amenable number.

61657260293545 is a deficient number, since it is larger than the sum of its proper divisors (22901268109079).

61657260293545 is a wasteful number, since it uses less digits than its factorization.

61657260293545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761636008399.

The product of its (nonzero) digits is 81648000, while the sum is 61.

The spelling of 61657260293545 in words is "sixty-one trillion, six hundred fifty-seven billion, two hundred sixty million, two hundred ninety-three thousand, five hundred forty-five".