61992917247 has 16 divisors (see below), whose sum is σ = 87524472672. Its totient is φ = 38895267840.

The previous prime is 61992917243. The next prime is 61992917263. The reversal of 61992917247 is 74271929916.

It is not a de Polignac number, because 61992917247 - 2² = 61992917243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61992917243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1548847 + ... + 1588367.

It is an arithmetic number, because the mean of its divisors is an integer number (5470279542).

Almost surely, 2^61992917247 is an apocalyptic number.

61992917247 is a deficient number, since it is larger than the sum of its proper divisors (25531555425).

61992917247 is a wasteful number, since it uses less digits than its factorization.

61992917247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70298.

The product of its digits is 3429216, while the sum is 57.

The spelling of 61992917247 in words is "sixty-one billion, nine hundred ninety-two million, nine hundred seventeen thousand, two hundred forty-seven".