61430157571 has 4 divisors (see below), whose sum is σ = 61461075592. Its totient is φ = 61399239552.

The previous prime is 61430157559. The next prime is 61430157583. The reversal of 61430157571 is 17575103416.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61430157559) and next prime (61430157583).

It is a cyclic number.

It is not a de Polignac number, because 61430157571 - 2⁵ = 61430157539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61430157071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15456030 + ... + 15460003.

It is an arithmetic number, because the mean of its divisors is an integer number (15365268898).

Almost surely, 2^61430157571 is an apocalyptic number.

61430157571 is a deficient number, since it is larger than the sum of its proper divisors (30918021).

61430157571 is a wasteful number, since it uses less digits than its factorization.

61430157571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30918020.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 61430157571 in words is "sixty-one billion, four hundred thirty million, one hundred fifty-seven thousand, five hundred seventy-one".