245211687690 has 16 divisors (see below), whose sum is σ = 588508050528. Its totient is φ = 65389783376.

The previous prime is 245211687619. The next prime is 245211687709. The reversal of 245211687690 is 96786112542.

245211687690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×245211687690² (a number of 24 digits) contains 22 as substring.

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, 4086861432 + ... + 4086861491.

It is an arithmetic number, because the mean of its divisors is an integer number (36781753158).

Almost surely, 2^245211687690 is an apocalyptic number.

245211687690 is an abundant number, since it is smaller than the sum of its proper divisors (343296362838).

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

245211687690 is a wasteful number, since it uses less digits than its factorization.

245211687690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173722933.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 245211687690 in words is "two hundred forty-five billion, two hundred eleven million, six hundred eighty-seven thousand, six hundred ninety".