61508357121 has 8 divisors (see below), whose sum is σ = 83049258880. Its totient is φ = 40486513392.

The previous prime is 61508357059. The next prime is 61508357123. The reversal of 61508357121 is 12175380516.

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

It is not a de Polignac number, because 61508357121 - 2¹⁹ = 61507832833 is a prime.

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 61508357121.

It is not an unprimeable number, because it can be changed into a prime (61508357123) 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, 129764230 + ... + 129764703.

It is an arithmetic number, because the mean of its divisors is an integer number (10381157360).

Almost surely, 2^61508357121 is an apocalyptic number.

It is an amenable number.

61508357121 is a deficient number, since it is larger than the sum of its proper divisors (21540901759).

61508357121 is a wasteful number, since it uses less digits than its factorization.

61508357121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259529015.

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 61508357121 in words is "sixty-one billion, five hundred eight million, three hundred fifty-seven thousand, one hundred twenty-one".