61790650740 has 240 divisors, whose sum is σ = 238572335232. Its totient is φ = 13037117184.

The previous prime is 61790650687. The next prime is 61790650741. The reversal of 61790650740 is 4705609716.

It is a happy number.

61790650740 is a `hidden beast` number, since 6 + 17 + 90 + 6 + 507 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61790650741) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 62154 + ... + 356993.

Almost surely, 2^61790650740 is an apocalyptic number.

61790650740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61790650740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119286167616).

61790650740 is an abundant number, since it is smaller than the sum of its proper divisors (176781684492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61790650740 is a wasteful number, since it uses less digits than its factorization.

61790650740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419188 (or 419177 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 61790650740 in words is "sixty-one billion, seven hundred ninety million, six hundred fifty thousand, seven hundred forty".